Verb movement

Dutch

 REL NP    NP   NP      DET      NP     V   V      V
 dat Peter Hans Cecilia de       vogels zag halpen fotografen
      |     |       |                    |    |         |
      |     |       |                    |    |         |
      |     |       |                    |    |         |
      -----------------------------------     |         |
            |       |                         |         |
            |       |                         |         |
            ----------------------------------          |
                    |                                   |
                    |                                   |
                    ------------------------------------

 that Peter Hans Cecila the      birds  ?   help   photograph

http://www.let.rug.nl/~gosse/nlp1/dcg.pdf