A man helps a little girl ride a bike.
A father teaches his daughter how to ride a bike.
Helping has more definitions than just teaching, and two people need not be father and daughter.
exists e2 e1 s1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_ride(e2) & n_bike(x4) & Theme(e1,x3) & Actor(e1,x2) & v_help(e1) & n_girl(x3) & a_little(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 p1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_ride(e2) & n_bike(x3)) & n_daughter(x2) & of(x2,x1) & n_male(x1) & n_father(x1))