A man with a yellow helmet riding a red and yellow motorbike in a motocross arena.
A man inside.
The man riding a motorbike in a motocross arena is also inside, meaning the arena is indoors.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & in(e1,x5) & n_arena(x5) & of(x5,x6) & n_motocross(x6) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_motorbike(x4) & a_yellow(s3) & Theme(s3,x4) & a_red(s2) & Theme(s2,x4) & (x2 = x3) & n_helmet(x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & n_inside(x1) & of(x1,x2) & n_man(x2))