Some young people take photos of each other while in New York.
People are in New York City.
Young people are people. Taking photos while in New York requires that the people be in New York.
exists s1 x1 x2 x4 x5.(ne_geo_york(x4) & (x4 = x5) & ne_geo_new(x5) & all x3.(n_other(x3) -> exists e1.(in(e1,x4) & r_while(e1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & of(x2,x3))) & n_photo(x2) & n_people(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1 x2 x3 x4.(ne_geo_city(x2) & (x2 = x4) & ne_geo_york(x4) & (x2 = x3) & ne_geo_new(x3) & in(x1,x2) & n_people(x1))