Two men are playing basketball and one is trying to block the other.
A pair of men play basketball.
The word pair refers to two, so a pair of men is the same as two men.
exists e1 e2 p1 x1 x2 x3 x4.(n_other(x4) & Topic(e2,p1) & Actor(e2,x3) & v_try(e2) & exists e3.(Theme(e3,x4) & Actor(e3,x3) & v_block(e3)) & n_thing(x3) & card_eq_1(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_basketball(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_basketball(x3) & of(x1,x2) & n_man(x2) & n_pair(x1))