There is one person sitting under an umbrella and two other sitting in the sun.
A person is using an umbrella to block the sun.
they person is using the umbrella by sitting under it
exists p1 x1 x8.(n_sun(x8) & exists e1 e2 x2 x3 x4 x5 x6 x7.((x1 = x2) & subset_of(x6,x2) & in(e2,x8) & Actor(e2,x7) & v_sit(e2) & (x6 = x7) & r_other(x6) & n_thing(x6) & card_eq_2(x6) & subset_of(x3,x2) & under(e1,x5) & n_umbrella(x5) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_person(x3) & card_eq_1(x3)))
exists e1 p1 x1 x2 x3.(n_sun(x3) & Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2.(Theme(e2,x3) & Actor(e2,x1) & v_block(e2)) & n_umbrella(x2) & n_person(x1))