A group of girls and a boy sit on the lawn talking.
A group of adults are having a picnic.
The girls and boy could be adults.
exists e2 e1 x1 x2 x3 x4 x5.(n_lawn(x5) & for(e1,e2) & Actor(e2,x1) & v_talking(e2) & on(e1,x5) & Actor(e1,x1) & v_sit(e1) & subset_of(x4,x1) & n_boy(x4) & subset_of(x2,x1) & of(x2,x3) & n_girl(x3) & n_group(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_picnic(x3) & of(x1,x2) & n_adult(x2) & n_group(x1))