( 
  (IP 
    (DFL 
      (AD 就)
		     
      (P 像))
		
    (PU ，)
		
    (FLR 
      (IJ 嗯))
		
    (PU ，)
		
    (NP-SBJ 
      (PN 我))
		
    (VP 
      (ADVP 
        (AD 经常))
		    
      (VP 
        (VV 说)
			
        (PU ，)
			
        (IP-OBJ 
          (NP-SBJ 
            (PN 这))
				
          (VP 
            (VP 
              (ADVP 
                (AD 就))
					
              (VP 
                (VV 像)
					    
                (IP-OBJ 
                  (NP-SBJ 
                    (-NONE- *pro*))
						    
                  (VP 
                    (VP 
                      (PP-LOC 
                        (P 在)
								    
                        (NP 
                          (NN 街上)))
							    
                      (VP 
                        (VV 走路)))
							
                    (PU ，)
							
                    (VP 
                      (ADVP 
                        (AD 突然))
							    
                      (VP 
                        (VV 掉进)
								
                        (AS 了)
								
                        (LCP-OBJ 
                          (LCP 
                            (NP 
                              (NN 下水道))
									      
                            (LC 里))
									 
                          (PU ，)
									 
                          (PRN 
                            (NP 
                              (QP 
                                (CD 一)
										      
                                (CLP 
                                  (M 个)))
										  
                              (PU ，)
										  
                              (PRN 
                                (IP-ADV 
                                  (NP-SBJ 
                                    (PN 你))
											       
                                  (VP 
                                    (VV 知道))))
										  
                              (PU ，)
										  
                              (DFL 
                                (CD 一)
										       
                                (M 个))
										  
                              (FLR 
                                (IJ 呃)
										       
                                (PU ，)
										       
                                (IJ 呃))
										  
                              (PU ，)
										  
                              (CP 
                                (WHNP-1 
                                  (-NONE- *OP*))
										      
                                (CP 
                                  (IP 
                                    (NP-SBJ 
                                      (-NONE- *T*-1))
											      
                                    (VP 
                                      (VE 没有)
												  
                                      (NP-OBJ 
                                        (NN 井盖))))
											  
                                  (DEC 的)))
										  
                              (NP 
                                (NN 下水道)
										      
                                (NN 洞口)))))))))))
				    
            (PU ，)
				    
            (VP 
              (ADVP 
                (AD 然后))
					
              (PU ，)
					
              (IP-ADV 
                (NP-SBJ 
                  (PN 你))
						
                (VP 
                  (VV 知道)))
					
              (PU ，)
					
              (ADVP 
                (AD 就))
					
              (PP-ADV 
                (P 像)
						
                (IP 
                  (NP-SBJ 
                    (-NONE- *pro*))
						    
                  (VP 
                    (VV 消失)
							
                    (AS 了))))
					
              (VP 
                (VA 一样)))))))
		
    (PU ．)))
arg0: 
	  *pro* 
	  
argm: 
	  在街上走路  
	  
argm: 
	  突然 
	  
arg1: 
	  下水道里