Two men holding skateboards and one man skateboarding.
Men are at a skatepark performing tricks.
Holding a skateboard and skateboarding does not imply performing tricks.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_skateboarding(x5) & of(x5,x6) & n_man(x6) & card_eq_1(x5) & n_skateboard(x4) & subset_of(x5,x3) & subset_of(x4,x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(exists e1 x2 x3 x4.(at(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_trick(x4) & (x2 = x3) & n_skatepark(x2)) & n_man(x1))