Two indians people trading their goods.
There are people trading items while at work.
You can not infer they are at work.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_trade(e1) & n_goods(x4) & of(x4,x1) & n_thing(x1) & (x1 = x3) & n_people(x1) & of(x1,x2) & n_indian(x2) & card_eq_2(x1))
exists p1 x1 e1 x2 x3 x4 x5.((x1 = x2) & at(e1,x5) & n_work(x5) & r_while(e1) & Theme(e1,x4) & Actor(e1,x3) & v_trade(e1) & n_item(x4) & (x2 = x3) & n_people(x2))