Sentence:  The <WSD>material</WSD> of the Porter film is simplicity itself ; much of it has continued to be used over the years and the heart of it - good guys and bad guys in the old West - pretty well dominated television toward the end of the 1950's . 
Meaning of the word marked with <WSD> tags:  information (data or ideas or observations) that can be used or reworked into a finished form