4 people watch as a person jumps off a pier.
People are observing another person near the water.
"People are observing" is a rephrasing of "people watch". A pier is usually near the water.
exists e1 p1 x1 x2.(exists e2 s1 x3.(a_off(s1) & Manner(e2,s1) & Actor(e2,x3) & v_jump(e2) & n_person(x3)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_pier(x2) & n_people(x1) & n_date(x1) & a_date_day_04(x1) & a_date_day_04(x1))
exists e1 x1 x2 x3 x4.(n_water(x4) & n_person(x2) & Theme(e1,x3) & Actor(e1,x1) & v_observe(e1) & near(x3,x4) & n_person(x3) & -(x3 = x2) & n_people(x1))