A group of guys in a marathon bicycle race with the crowd cheering them on
A group of people are riding bicycles.
A group of guys is also a group of people.  Being in a marathon bicycle race means you are riding bicycles.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_thing(x6) & n_crowd(x6) & a_topic(x1) & of(x1,x2) & in(x2,x3) & with(x3,x6) & a_on(s1) & Manner(e1,s1) & Theme(e1,x6) & Actor(e1,x7) & v_cheer(e1) & (x6 = x7) & n_race(x3) & of(x3,x5) & n_bicycle(x5) & of(x3,x4) & n_marathon(x4) & n_guy(x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x3) & of(x1,x2) & n_people(x2) & n_group(x1))