Question: In American football, only two guards have been drafted in the first round of the NFL draft by the Chicago Bears. In what year did the more recent of these two drafts occur?
Sentence (from "Roger Davis (American football)"): Roger Wilfred Davis (born June 23, 1938) is a former professional American football player who played offensive lineman for seven seasons for the Chicago Bears, the Los Angeles Rams, and the New York Giants.
Relevant evidence: No