A group of ladies with computers sit behind a table while people on the other side purchase something.
The women are busy exchanging money.
Sit behind a table while people on other side purchase something does not necessarily mean exchanging money
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(-(x6 = x6) & n_purchase(x6) & of(x6,x8) & n_side(x8) & of(x6,x7) & n_side(x7) & a_something(s1) & Manner(e1,s1) & on(e1,x6) & while(e1,x5) & n_people(x5) & behind(e1,x4) & n_table(x4) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & with(x2,x3) & n_computer(x3) & n_lady(x2) & n_group(x1))
exists e1 p1 x1.(n_woman(x1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_exchange(e2) & n_money(x2)) & Topic(e1,p1) & Actor(e1,x1) & v_busy(e1))