4 people watch as a person jumps off a pier.
A person performs a swan dive off of a pier.
Jumps off does not imply to perform a swan dive.
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.(of(e1,x4) & n_pier(x4) & r_off(e1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_dive(x2) & of(x2,x3) & n_swan(x3) & n_person(x1))