5. The computer-implemented method of claim 1 , further comprising: selecting one or more nouns from words in the first page; and for each of the nouns, determining a number of times the noun appears in the first page; and if the number satisfies a threshold requirement, then identifying the noun as one of the plurality of keywords.
14. One or more non-transitory storage media storing instructions which, when executed by one or more processors cause performance of the method recited in claim 5 .