Three young men row an air-filled raft down a concrete-sided waterway.
Fraternity brothers try to win a crazy race.
We don't know if the men are fraternity brothers.
exists e1 s1 s2 s3 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_row(e1) & down(x2,x3) & n_waterway(x3) & a_concrete-sided(s3) & Theme(s3,x3) & n_raft(x2) & a_air-filled(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 s1 x3.(Theme(e2,x3) & Actor(e2,x1) & v_win(e2) & n_race(x3) & a_crazy(s1) & Theme(s1,x3)) & n_brother(x1) & (x1 = x2) & ne_nam_fraternity(x2))