(IP 
  (NP-SBJ 
    (PN 他们))
                    
  (VP 
    (VP 
      (BA 把)
                    
      (IP-OBJ 
        (NP-SBJ 
          (NN 陶土))
                    
        (VP 
          (PP-DIR 
            (P 往)
                    
            (LCP 
              (NP 
                (NN 嘴巴))
                    
              (LC 里)))
                    
          (ADVP 
            (AD 一))
                    
          (VP 
            (VV 丢)))))
                    
    (PU ，)
                    
    (VP 
      (IP-ADV 
        (NP-SBJ 
          (-NONE- *PRO*))
                    
        (VP 
          (VCD 
            (VV 咬)
                    
            (CD 一)
                    
            (VV 咬))
                    
          (PU ，)
                    
          (VCD 
            (VV 嚼)
                    
            (CD 一)
                    
            (VV 嚼))))
                    
      (PU ，)
                    
      (ADVP 
        (AD 就))
                    
      (VP 
        (VV 知道)
                    
        (NP-OBJ 
          (NN 好坏))))))
arg0: 
                    *PRO*