Two people are swimming in a pool with a ball.
people swimming with ball
Sentence 1 is missing the number of people
exists e1 x1 x2 x3.(in(e1,x3) & n_pool(x3) & with(e1,x2) & n_ball(x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & with(e1,x3) & n_ball(x3) & Actor(e1,x2) & v_swim(e1) & (x1 = x2) & n_people(x1))