ancillary data are often very diverse, may include maps, vegetation phenologies, and many kinds of information about human activities in the general area. human experts bring all these element s, plus their acquired skills and knowledge of related disciplines ...
Fritz Pollard and Bobby Marshall were the first black players in what is now the NFL in 1920. Pollard became the first (and until 1989, only) black coach in 1921; during the early-to-mid-1920s, the league used player-coaches and did not have separate coaching staffs.
Leon Gray (November 15, 1951 â November 11, 2001) was an American football tackle in the National Football League for the New England Patriots, Houston Oilers, and the New Orleans Saints. Gray played college football at Jackson State University.