A man in red swim trunks is serving a beach volleyball.
A man is serving a volleyball with his friends.
A man playing beach volleyball is not necessarily playing with his friends.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x4) & Actor(e1,x1) & v_serve(e1) & n_volleyball(x4) & of(x4,x5) & n_beach(x5) & in(x1,x2) & n_trunk(x2) & of(x2,x3) & n_swim(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(with(e1,x3) & n_friend(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_serve(e1) & n_volleyball(x2) & n_man(x1))