A boy watches a nightly event while leaning on a rail.
The boy is at school.
The boy is either leaning  on a rail or at school
exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & on(e2,x3) & n_rail(x3) & Actor(e2,x1) & v_lean(e2) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_event(x2) & a_nightly(s1) & Theme(s1,x2) & n_boy(x1))
exists p1 x1.(n_boy(x1) & exists x2.(at(x1,x2) & n_school(x2)))