Young boys line up at the line of scrimmage during a football game on a gray day.
A group of girls are busy cheerleading outside.
Boys and girls are different genders.  One would not be cheerleading while also playing a football game.
exists s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_line(x3) & a_topic(x1) & n_up(x1) & at(x1,x3) & of(x3,x4) & during(x4,x5) & on(x5,x7) & n_day(x7) & a_gray(s2) & Theme(s2,x7) & n_game(x5) & of(x5,x6) & n_football(x6) & n_scrimmage(x4) & n_line(x1) & of(x1,x2) & n_boy(x2) & a_young(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_cheerlead(e2) & n_outside(x3)) & Topic(e1,p1) & Actor(e1,x1) & v_busy(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))