A boy petting a white bull.
A boy nervously petting a bull.
Not all boys petting a bull are nervously doing that.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_pet(e1) & n_bull(x3) & a_white(s1) & Theme(s1,x3) & (x1 = x2) & n_boy(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_nervously(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_pet(e1) & n_bull(x3) & (x1 = x2) & n_boy(x1))