40. The system of claim 1 , wherein generating the first metadata item comprises: extracting text from the activity history; and generating the first metadata item based upon the text.
40. The system of claim 1 , wherein generating the first metadata item comprises: extracting text from the activity history; and generating the first metadata item based upon the text. 41. The system of claim 40 , wherein generating the first metadata item based upon the text comprises: using a stemming method to generate a stem word based upon the text; and generating the first metadata item based upon the stem word.