A man sitting in a large innertube drinking a beer.
A man is drinking beer.
Drinking a beer is rephrased is drinking beer
exists e1 x1 x2.(a_topic(x1) & all x3.(n_beer(x3) -> exists s1 x4 x5.(in(e1,x4) & for(x4,x3) & n_drinking(x4) & of(x4,x5) & n_innertube(x5) & a_large(s1) & Theme(s1,x4))) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_beer(x2) & n_man(x1))