(VP 
  (VC 是)
                    
  (NP-PRD 
    (CP 
      (WHNP-3 
        (-NONE- *OP*))
                    
      (CP 
        (IP 
          (NP-SBJ 
            (-NONE- *T*-3))
                    
          (VP 
            (PP-LGS 
              (P 由)
                    
              (CP 
                (WHNP-2 
                  (-NONE- *OP*))
                    
                (CP 
                  (IP 
                    (NP-TPC 
                      (-NONE- *T*-2))
                    
                    (NP-SBJ 
                      (NN 总部))
                    
                    (VP 
                      (VV 设在)
                    
                      (NP-PN-OBJ 
                        (NR 日内瓦))))
                    
                  (DEC 的)))
                    
              (NP-PN 
                (NN 世界)
                    
                (NN 经济)
                    
                (NN 论坛)))
                    
            (VP 
              (VV 主办))))
                    
        (DEC 的)))))
arg1: 
                    总部 
                
arg1: 
                    *T*-2 
                
arg2: 
                    日内瓦