Two people riding bikes through a mountainous region.
Two people having a picnic.
One cannot ride bikes while having a picnic
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & through(e1,x4) & n_region(x4) & a_mountainous(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_picnic(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))