There are many people collected in a field.
The people are in a bus.
People can either be in a bus or on a field.
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & in(e1,x4) & n_field(x4) & Theme(e1,x3) & v_collect(e1) & (x2 = x3) & n_people(x2) & n_quantity(x2))
exists p1 x1.(n_people(x1) & exists x2.(in(x1,x2) & n_bus(x2)))