People gather at a roadside park with motorcycles.
A crowd of people are near vehicles.
Crowd and people are both plural forms meaning many individuals, to gather is to often be near something, and motorcycles are vehicles.
exists e1 x1 x2 x3 x4.(at(e1,x2) & with(x2,x4) & n_motorcycle(x4) & n_park(x2) & of(x2,x3) & n_roadside(x3) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists p1 x1 x2.(exists s1 x3.((x1 = x3) & n_vehicle(x3) & a_near(s1) & Theme(s1,x3)) & of(x1,x2) & n_people(x2) & n_crowd(x1))