A man, protected by a helmet and other protective gear, is battling his way down rough rapids in a red one-man kayak.
sly stalone rafts for the first time
Not all men are sly stalone.  A kayak is not a rafts.  Going down the rapids does not imply it is the first time.
exists e1 e2 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10.(n_way(x7) & of(x7,x6) & n_male(x6) & n_gear(x6) & a_protective(s2) & Theme(s2,x6) & Theme(e2,x7) & Actor(e2,x1) & v_battle(e2) & down(x7,x8) & in(x8,x9) & n_kayak(x9) & of(x9,x10) & n_one-man(x10) & a_red(s4) & Theme(s4,x9) & n_rapid(x8) & a_rough(s3) & Theme(s3,x8) & Actor(e1,x3) & -(x5 = x6) & n_gear(x5) & a_protective(s1) & Theme(s1,x5) & n_helmet(x4) & subset_of(x5,x3) & subset_of(x4,x3) & Theme(e1,x2) & v_protect(e1) & (x1 = x2) & n_man(x1))
exists s1 s2 x1 x2.(n_time(x2) & a_first(s2) & Theme(s2,x2) & a_topic(x1) & for(x1,x2) & n_raft(x1) & a_stalone(s1) & Theme(s1,x1) & r_sly(x1))