Three individuals are scuba diving.
Three people are diving for sea shells.
three people need not scuba dive for sea shells.
exists p1 x1.(exists s1 x2.((x1 = x2) & n_diving(x2) & a_scuba(s1) & Theme(s1,x2)) & n_individual(x1) & card_eq_3(x1))
exists e1 x1 x2 x3.(for(e1,x2) & n_shell(x2) & of(x2,x3) & n_sea(x3) & Actor(e1,x1) & v_dive(e1) & n_people(x1) & card_eq_3(x1))