(IP 
  (NP-SBJ 
    (NN 内中))
                    
  (VP 
    (ADVP 
      (AD 却))
                    
    (VP 
      (VE 无)
                    
      (NP-OBJ 
        (CP 
          (WHNP-3 
            (-NONE- *OP*))
                    
          (CP 
            (IP 
              (NP-SBJ 
                (-NONE- *T*-3))
                    
              (VP 
                (LCP-TMP 
                  (IP 
                    (NP-SBJ 
                      (NP-PN 
                        (NR 中))
                    
                      (NP 
                        (NN 西))
                    
                      (NP 
                        (NN 乐器)))
                    
                    (VP 
                      (VV 合奏)))
                    
                  (LC 时))
                    
                (ADVP 
                  (AD 常))
                    
                (VP 
                  (VV 碰到))))
                    
            (DEC 的)))
                    
        (NP 
          (NP 
            (PU 「)
                    
            (NN 主)
                    
            (NN 从)
                    
            (PU 」))
                    
          (NP 
            (NN 问题)))))))
arg2: 
                    中 西 乐器