While a man's mowing lawn, a man and a woman are helping him to clean up the backyard.
three people are swimming in the pool
The people can't be swimming in the pool while mowing the lawn.
exists e1 p1 x1 x2 x3 x4 x5 x6 x7.(n_backyard(x7) & while(e1,x5) & n_lawn(x5) & of(x5,x6) & n_mowing(x6) & of(x5,x4) & n_man(x4) & Topic(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_help(e1) & exists e2 s1.(a_up(s1) & Manner(e2,s1) & Theme(e2,x7) & Actor(e2,x2) & v_clean(e2)) & n_male(x2) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 x1 x2.(n_pool(x2) & in(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1) & card_eq_3(x1))