Aspect based sentiment analysis with contextual grouping of aspects

A computer-implemented method of aspect-based sentiment analysis, the method comprising:

• receiving a collection of textual data;
• extracting a set of aspects and a set of sentiment words from the textual data;
• identifying a set of aspect-sentiment word pairs from the extracted aspects and sentiment words, wherein each of the set of aspect-sentiment word pairs includes an aspect word from the set of aspects and a sentiment word from the set of sentiment words;
• identifying a subset of aspect-sentiment word pairs according to a set of predefined rules, wherein each of the subset of aspect-sentiment word pairs is determined to have an aspect-sentiment relationship according to the set of predefined rules;
• and
• grouping a plurality of aspects associated with the subset of aspect-sentiment word pairs into one or more clusters.

A computer program product for aspect-based sentiment analysis, the computer program product comprising a non-transitory computer-readable medium having computer-readable program code stored thereon, the computer-readable program code configured to:

• receive a collection of textual data;
• extract a set of aspects and a set of sentiment words from the textual data;
• identify a set of aspect-sentiment word pairs from the extracted aspects and sentiment words, wherein each of the set of aspect-sentiment word pairs includes an aspect word from the set of aspects and a sentiment word from the set of sentiment words;
• identify a subset of aspect-sentiment word pairs according to a set of predefined rules, wherein each of the subset of aspect-sentiment word pairs is determined to have an aspect-sentiment relationship according to the set of predefined rules;
• and
• group a plurality of aspects associated with the subset of aspect-sentiment word pairs into one or more clusters.