original: it serves as an original source of information about the topic .
simplifications: it serves as an original source of information about the title . it is an original source of information about the topic . it is one of the first sources of information about the topic . it serves as an original source of information about the topic . it is a source of information about the topic . it serves as an original source of information about the topic . it is an original source of information about the topic . it serves as an original source of information about the topic .