A pair of men in shorts lay on the concrete in a drainage culvert, surrounded by graffiti.
Two men are skateboarding on the concrete.
They either lay on the concrete or are skateboarding, not both at the same time.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8.(n_concrete(x4) & on(e1,x4) & in(x4,x5) & Actor(e2,x8) & n_graffitus(x8) & Theme(e2,x7) & v_surround(e2) & (x5 = x7) & n_culvert(x5) & of(x5,x6) & n_drainage(x6) & Actor(e1,x1) & v_lay(e1) & of(x1,x2) & in(x2,x3) & n_shorts(x3) & n_man(x2) & n_pair(x1))
exists e1 x1 x2.(n_concrete(x2) & on(e1,x2) & Actor(e1,x1) & v_skateboard(e1) & n_man(x1) & card_eq_2(x1))