There are some men and women sitting outside on a lawn having a barbecue, there is food cooking an the grill and food on a table.
Men and women skinny dipping
People who are skinny dipping are not sitting outside having a barbecue.
exists p1 x1 e2 e1 p2 s1 x2 x3 x4 x5 x6 x7.((x1 = x2) & for(e1,e2) & Theme(e2,x7) & Actor(e2,x5) & v_have(e2) & exists p3 x8 e3 x9 x10 x11 x12 x13 x14.((x8 = x9) & Theme(e3,x11) & Actor(e3,x10) & v_cook(e3) & on(x11,x14) & n_table(x14) & n_food(x13) & n_grill(x12) & subset_of(x13,x11) & subset_of(x12,x11) & (x9 = x10) & n_food(x9)) & that(x7,p2) & n_barbecue(x7) & on(e1,x6) & n_lawn(x6) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x5) & v_sit(e1) & (x2 = x5) & subset_of(x4,x2) & n_woman(x4) & subset_of(x3,x2) & n_man(x3))
exists s1 x1 x2 x3 x4.(n_dipping(x2) & of(x2,x4) & n_skinny(x4) & of(x2,x3) & n_woman(x3) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_topic(s1))