A man in a brown jacket stands on a bus.
Someone is in a bus.
A man is someone.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_bus(x3) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_jacket(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_bus(x2)) & n_person(x1))