A group of people stand in the back of a truck filled with cotton.
Farmers are taking their crop to market.
A group of people are not necessarily farmers and a truck filled with cotton does not imply that it is being taken to market.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_back(x3) & in(e1,x3) & of(x3,x4) & with(e2,x6) & n_cotton(x6) & Theme(e2,x5) & v_fill(e2) & (x4 = x5) & n_truck(x4) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(to(e1,x3) & n_market(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_crop(x2) & of(x2,x1) & n_thing(x1) & n_farmer(x1))