A young red-haired man is fishing and caught some seaweed.
A man is catching seaweed.
A young red-haired man is a type of man, and caught some seaweed is a paraphrase of catching seaweed.
exists e1 p1 s1 s2 s3 s4 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x2) & v_catch(e1) & n_seaweed(x3) & n_man(x2) & a_red-haired(s4) & Theme(s4,x2) & a_young(s3) & Theme(s3,x2) & exists x4.((x1 = x4) & n_fishing(x4)) & n_man(x1) & a_red-haired(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_seaweed(x2) & n_man(x1))