A group of people boards a bus.
A group of people are travelling
The people are traveling so therefore can be by bus.
exists e1 x1 x2 x3.(n_bus(x3) & Time(e1,x3) & Actor(e1,x1) & v_board(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_travel(e1) & of(x1,x2) & n_people(x2) & n_group(x1))