Three young men and a young woman wearing sneakers are leaping in midair at the top of a flight of concrete stairs.
Some people wearing shoes jump in the sir.
Three men and a woman wearing sneakers leap does imply that some people wearing shoes jump.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_top(x7) & at(e2,x7) & of(x7,x8) & of(x8,x9) & n_stair(x9) & a_concrete(s3) & Theme(s3,x9) & n_flight(x8) & in(e2,x6) & n_midair(x6) & Actor(e2,x1) & v_leap(e2) & subset_of(x3,x1) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & n_sneaker(x5) & (x3 = x4) & n_woman(x3) & a_young(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_man(x2) & a_young(s1) & Theme(s1,x2) & card_eq_3(x2))
exists e1 x1 x2 x3 x4 x5.(n_sir(x5) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & in(x3,x5) & n_jump(x3) & of(x3,x4) & n_shoe(x4) & (x1 = x2) & n_people(x1))