Someone is riding a motorcycle down a racetrack during daylight hours.
Someone is riding a bike at night.
can either be daylight or night
exists e1 s1 x1 x2 x3 x4.(during(e1,x4) & n_hour(x4) & a_daylight(s1) & Theme(s1,x4) & down(e1,x3) & n_racetrack(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & n_person(x1))
exists e1 x1 x2 x3.(at(e1,x3) & n_night(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_person(x1))