A man in a cap teaches children proper bike maintenance.
A lady is watching a movie.
A man and a lady are two different people.  One of them teaches children while the other is watching a movie
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_teach(e1) & n_maintenance(x3) & of(x3,x5) & n_bike(x5) & a_proper(s1) & Theme(s1,x3) & of(x3,x4) & n_child(x4) & in(x1,x2) & n_cap(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_movie(x2) & n_lady(x1))