A man is sitting down and holding a young boy.
The man is not alone.
A man holding a young boy can't be called alone.
exists e2 e1 s1 s2 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_hold(e2) & n_boy(x3) & a_young(s2) & Theme(s2,x3) & n_man(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists x1.(n_man(x1) & -exists s1.(Theme(s1,x1) & a_alone(s1)))