The set of phrases selected for one entry may come from several reviews on this single entry, and many of them may include the same noun (e.g., 'good fish', 'not bad fish' and 'aboveaverage fish' for one restaurant).
from the dataset, 857,466 sentences were subjected to parse analysis; and a total of 434,372 phrases (114,369 unique ones) were extracted from the parsable subset (78.6%) of the sentences.