A group of spectators watch a men's sand volleyball game.
There are both male and female spectators watching a volleyball game.
Spectators can be all male or all female so it can not be assumed they are both male and female spectators.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_watch(e1) & n_game(x3) & of(x3,x5) & n_volleyball(x5) & of(x3,x4) & n_sand(x4) & a_'s(s1) & Theme(s1,x3) & r_man(x3) & of(x1,x2) & n_spectator(x2) & n_group(x1))
exists p1 s1 s2 x1 x2.(n_spectator(x2) & a_female(s2) & Theme(s2,x2) & a_male(s1) & Theme(s1,x2) & exists e1 x3 x4 x5.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_game(x4) & of(x4,x5) & n_volleyball(x5) & (x2 = x3)))