People are standing and discussing in a road near a bus.
People are pushing the bus
You cannot be standing and discussing near a bus and be pushing the bus simultaneously.
exists e2 e1 s1 x1 x2 x3 x4.(a_in(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x2) & v_discuss(e2) & near(x3,x4) & n_bus(x4) & n_road(x3) & n_people(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2.(n_bus(x2) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_people(x1))