Complex sentence: Lupe Joseph Arenas (born December 12,1925 in Cedar Rapids, Iowa) was a halfback and defensive back for the San Francisco 49ers from the 1951 to 1957.
Split into simpler sentences: Lupe Joseph Arenas (born December 12,1925 in Cedar Rapids, Iowa) is a former American football player. He was a halfback and defensive back for the San Francisco 49ers from the 1951 to 1957.