The person is bicycling on the street at nighttime.
The street has a bicyclist riding down it.
A person bicycling is a bicyclist.
exists e1 x1 x2 x3.(n_street(x2) & n_person(x1) & at(e1,x3) & n_nighttime(x3) & on(e1,x2) & Actor(e1,x1) & v_bicycle(e1))
exists e2 e1 x1 x2 x3.(n_thing(x1) & n_street(x1) & Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & down(e1,x1) & Actor(e1,x3) & v_ride(e1) & (x2 = x3) & n_bicyclist(x2))