A man and children work on the engine of an old truck.
A man is showing his children how to fix a truck.
Just because a man and children are working, does not mean that children are his children.
exists e1 s1 x1 x2 x3 x4 x5.(n_engine(x4) & on(e1,x4) & of(x4,x5) & n_truck(x5) & a_old(s1) & Theme(s1,x5) & Actor(e1,x1) & v_work(e1) & subset_of(x3,x1) & n_child(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 p1 s1 x1 x2 x3.(Topic(e1,p1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x1) & v_fix(e2) & n_truck(x4)) & a_how(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_show(e1) & n_child(x3) & of(x3,x1) & n_male(x1) & n_man(x2) & n_man(x1))