Patent ID: 8913874

Claim:
An information providing server comprising: one or more processors and/or circuits in the information providing server, wherein the one or more processors and/or circuits are operable to: extract a first subtitle feature quantity representing a feature of first content from subtitle information included in the first content; associate and store identification information capable of identifying the first content and the first subtitle feature quantity extracted from the first content; receive comment information, from an information processing apparatus different from the information providing server, providing a user's comment on second content, wherein the information processing apparatus generates the comment information by attaching a second subtitle feature quantity corresponding to the second content to the user's comment; collate the stored first subtitle feature quantity and the second subtitle feature quantity included in the comment information received from the information processing apparatus; determine sameness between the first content corresponding to the stored first subtitle feature quantity and the second content corresponding to the second subtitle feature quantity based on the collation; and output a result based on the determined sameness.