A number of people of various ages sit on blankets on the grass.
The people are gathered for a summer concert.
Sitting on blankets on the grass does not mean a gathering for summer concert.
exists e1 s1 x1 x2 x3 x4 x5.(n_grass(x5) & on(e1,x5) & on(e1,x4) & n_blanket(x4) & Actor(e1,x1) & v_sit(e1) & of(x1,x3) & n_age(x3) & a_various(s1) & Theme(s1,x3) & of(x1,x2) & n_people(x2) & n_number(x1))
exists e1 x1 x2 x3.(n_people(x1) & for(e1,x2) & n_concert(x2) & of(x2,x3) & n_summer(x3) & Theme(e1,x1) & v_gather(e1))