People are checking out at target.
People are at a target.
Are checking out implies are at.
exists e1 s1 x1 x2.(a_out(s1) & Manner(e1,s1) & at(e1,x2) & n_target(x2) & Actor(e1,x1) & v_check(e1) & n_people(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_target(x2)) & n_people(x1))