One mechanic is sitting on the roof of a school bus with an open door, while the other is standing inside the bus.
Eating lunch on the school bus.
We have no idea if they are eating lunch, they could be doing a number of things.
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 x1 x2 x3.(n_bus(x2) & of(x2,x3) & n_school(x3) & a_topic(x1) & on(x1,x2) & n_lunch(x1) & Actor(e1,x1) & v_eat(e1))