source: [lemma=natural] [□] □
destination: [lemma=natural] [□=□] □
spec: Discussions have already taken place with the Students ' Union on methods of improving training of student representatives and enhancing their input to committee deliberations . The sight of several black figures moving briskly to and fro across its frozen surface seemed to suggest a mode of escape from the drive she dreaded in more ways than one . It 's natural to me . " It just happened so fast , and it became so natural to me to have the kids and nurture them , " Irene says .