One mechanic is sitting on the roof of a school bus with an open door, while the other is standing inside the bus.
The school bus is broken down.
Just because the one mechanic is sitting on the roof of school bus and other one standing inside the bus doesn't imply that the bus is broken.
exists e1 p1 s1 x1 x2 x3 x4 x5 x6.(n_other(x6) & n_roof(x2) & exists e2.(inside(e2,x3) & Actor(e2,x6) & v_stand(e2)) & n_bus(x3) & n_bus(x3) & while(e1,p1) & with(e1,x5) & n_door(x5) & a_open(s1) & Theme(s1,x5) & on(e1,x2) & of(x2,x3) & of(x3,x4) & n_school(x4) & Actor(e1,x1) & v_sit(e1) & n_mechanic(x1) & card_eq_1(x1))
exists e1 s1 x1 x2.(n_bus(x1) & of(x1,x2) & n_school(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x1) & v_break(e1))