neither... nor/RelEx

Example : "I could use neither the lorry nor the van. " 
 		 	 _to-do(could, use) 
    			_quantity(lorry, neither) 
    			_det(lorry, neither) 
  		 	conj_nor(lorry, van) 
    			_obj(use, lorry) 
    			_obj(use, van) 
   			 _subj(use, I) 
this can't be right .. it is looking for conjunctions, and the O link is not a conjunction. !?!?