Question: William Frederick Truax, is a former professional American football tight end in the National Football League (NFL) from 1964 to 1973 for the Los Angeles Rams and the Dallas Cowboys, following the 1970 NFL season, Truax was traded by the Rams to the Cowboys for wide receiver Lance Rentzel, a former American football flanker, in which organization?
{'answer': 'National Football League (NFL)', 'supporting_facts': [['Billy Truax', 2], ['Lance Rentzel', 0]]}