Systems and methods for generating playlists by applying search prompts to a model configured to generate structured queries

A computer system associated with a media-providing service, comprising:

• one or more processors;
• and
• memory storing one or more programs for execution by the one or more processors, the one or more programs comprising instructions for:
• storing, in a vector space, a plurality of respective vector representations for respective media content items;
• receiving a user input that includes a first text string;
• generating, using a neural network, a structured query based on a first portion of the first text string;
• identifying, based on the structured query, a pool of candidate media items, selected from the respective media content items represented by the plurality of respective vector representations;
• determining, based on the structured query, whether to generate a vector representation of a second portion of the first text string;
• in accordance with a determination to generate the vector representation of the second portion of the first text string:
• generating the vector representation of the second portion of the first text string, wherein the vector representation is embedded in the vector space in which the plurality of respective vector representations for respective media content items is stored;
• and
• identifying a first set of media items from the pool of candidate media items using the vector representation of the second portion of the first text string;
• providing one or more select first media items from the first set of media items to a user of the media-providing service;
• receiving a second user input that includes a second text string, different than the first text string;
• determining, by the neural network based on at least a portion of the second text string, to identify a second set of media items using the neural network without generating a structured query;
• and
• based on the determination to identify the second set of media items using the neural network without generating a structured query:
• forgoing generating a structured query;
• identifying, directly using the neural network, a second set of media items;
• and
• providing one or more select second media items from the second set of media items to the user of the media-providing service.

A non-transitory computer-readable storage medium storing one or more programs configured for execution by a computer system, the one or more programs comprising instructions for:

• storing, in a vector space, a plurality of respective vector representations for respective media content items;
• receiving a user input that includes a first text string;
• generating, using a neural network, a structured query based on a first portion of the first text string;
• identifying, based on the structured query, a pool of candidate media items, selected from the respective media content items represented by the plurality of respective vector representations;
• determining, based on the structured query, whether to generate a vector representation of a second portion of the first text string;
• in accordance with a determination to generate the vector representation of the second portion of the first text string:
• generating the vector representation of the second portion of the first text string, wherein the vector representation is embedded in the vector space in which the plurality of respective vector representations for respective media content items is stored;
• and
• identifying a first set of media items from the pool of candidate media items using the vector representation of the second portion of the first text string;
• providing one or more select media items from the first set of media items to a user of a media-providing service;
• receiving a second user input that includes a second text string, different than the first text string;
• determining, by the neural network based on at least a portion of the second text string, to identify a second set of media items using the neural network without generating a structured query;
• and
• based on the determination to identify the second set of media items using the neural network without generating a structured query:
• forgoing generating a structured query;
• identifying, directly using the neural network, a second set of media items;
• and
• providing one or more select second media items from the second set of media items to the user of the media-providing service.