11. The information processing apparatus according to claim 10 , wherein the processor calculates the sentence score as a square root of an average of a sum of squares of the first word score and the second word score.
10. The information processing apparatus according to claim 1 , wherein the word is a first word, the word score is a first word score, and the processor: extracts a second word from the document; calculates a second word score for the second word on the basis of an appearance frequency of the second word in the first category; and calculates the sentence score for the sentence on the basis of the first word score and the second word score.