(IP-OBJ 
  (NP-SBJ 
    (PN 他们))
                    
  (VP 
    (NP-TMP 
      (NT 目前))
                    
    (ADVP 
      (AD 正))
                    
    (VP 
      (VV 想)
                    
      (IP-OBJ 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VP 
            (VV 跨海))
                    
          (VP 
            (VV 去)
                    
            (VP 
              (VP 
                (VV 接)
                    
                (NP-OBJ 
                  (DNP 
                    (NP-PN 
                      (NR 美国))
                    
                    (DEG 的))
                    
                  (NP 
                    (NN 案子))))
                    
              (VP 
                (MSP 来)
                    
                (VP 
                  (VV 做))))))))))
arg0: 
                    *PRO*