Group of about a dozen people at a beach with someone sitting at an assembled booth, probably gathered for the Pipe Challenge.
Group of about a dozen people at a concert event in the city.
Beaches are not found in the city.  Most concerts are not held at the beach.
exists e3 e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(ne_org_challenge(x8) & (x8 = x9) & ne_org_pipe(x9) & ne_org_group(x1) & for(e3,x8) & a_probably(s1) & Manner(e3,s1) & Actor(e3,x1) & v_gather(e3) & of(x1,x2) & with(x2,x5) & at(e1,x7) & n_booth(x7) & Theme(e2,x7) & v_assemble(e2) & Actor(e1,x6) & v_sit(e1) & (x5 = x6) & n_person(x5) & at(x2,x4) & n_beach(x4) & r_about(x2) & n_people(x2) & of(x2,x3) & n_dozen(x3))
exists s1 x1 x2 x3 x4 x5.(n_city(x5) & ne_org_group(s1) & a_topic(s1) & of(s1,x1) & at(x1,x3) & in(x3,x5) & n_event(x3) & of(x3,x4) & n_concert(x4) & r_about(x1) & n_people(x1) & of(x1,x2) & n_dozen(x2))