A group of ladies with computers sit behind a table while people on the other side purchase something.
Clothing is purchased while on sale.
Something is not necessarily clothing and it is not necessarily on sale.
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 x1 x2.(ne_nam_clothing(x1) & on(e1,x2) & n_sale(x2) & r_while(e1) & Theme(e1,x1) & v_purchase(e1))