One guy surfing the waves in the ocean.
A man is learning how to surf.
Just because a man is ocean surfing doesn't imply he is learning how.
exists e1 x1 x2 x3 x4.(n_ocean(x4) & n_wave(x3) & a_topic(x1) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_surf(e1) & (x1 = x2) & n_guy(x1) & card_eq_1(x1))
exists e1 x1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_manner(x2) & exists e2 x3.(Actor(e2,x3) & v_surf(e2)) & n_man(x1))