A man in a yellow shirt is grilling food.
An older man is eating at a picnic table.
He can't be both grilling and eating at a table.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_grill(e1) & n_food(x3) & in(x1,x2) & n_shirt(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(at(e1,x2) & n_table(x2) & of(x2,x3) & n_picnic(x3) & Actor(e1,x1) & v_eat(e1) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))