Two young boys are digging in the sand with their hands.
The boys are swimming in the ocean.
Boys cannot dig and swim simultaneously.
exists e1 s1 x1 x2 x3.(n_sand(x2) & n_hand(x3) & of(x3,x2) & n_thing(x2) & in(e1,x2) & with(e1,x3) & Actor(e1,x1) & v_dig(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(n_ocean(x2) & n_boy(x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))