A group of people sits in the shade under a tree.
Some people are sitting under a tree while eating a picnic meal.
A group of people sits in the shade under a tree does not indicate that some people are sitting under a tree while eating a picnic meal.
exists e1 x1 x2 x3 x4.(n_shade(x3) & under(e1,x4) & n_tree(x4) & in(e1,x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e2 e1 x1 x2 x3 x4.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_eat(e2) & n_meal(x3) & of(x3,x4) & n_picnic(x4) & under(e1,x2) & n_tree(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))