Three boys without shirts sit on concrete steps next to water.
They are not wearing shirts
not wearing can be restated as without in this context
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_water(x3) & r_next(e1) & on(e1,x2) & n_step(x2) & a_concrete(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & -exists x4.(with(x1,x4) & n_shirt(x4)) & n_boy(x1) & card_eq_3(x1))
exists x1.(n_thing(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shirt(x2)))