( 
  (IP 
    (NP-SBJ 
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (-NONE- *T*-1))
                    
            (VP 
              (VCD 
                (VV 劳动)
                    
                (VV 归来))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 大学生们)))
                    
    (VP 
      (VP 
        (PP-LOC 
          (P 在)
                    
          (LCP 
            (NP 
              (DNP 
                (NP 
                  (NT 昨天))
                    
                (DEG 的))
                    
              (NP 
                (NN 座谈会)))
                    
            (LC 上)))
                    
        (VP 
          (VV 畅谈)
                    
          (NP-OBJ 
            (NN 体会))))
                    
      (PU ，)
                    
      (VP 
        (VV 认为)
                    
        (IP 
          (NP-SBJ 
            (NN 义务)
                    
            (NN 劳动))
                    
          (VP 
            (VP 
              (VV 使)
                    
              (NP-OBJ 
                (DNP 
                  (NP 
                    (NN 爱国))
                    
                  (DEG 之))
                    
                (NP 
                  (NN 心)))
                    
              (IP 
                (NP-SBJ 
                  (-NONE- *PRO*))
                    
                (VP 
                  (VV 得以)
                    
                  (VP 
                    (VV 化为)
                    
                    (NP-OBJ 
                      (DNP 
                        (NP 
                          (NN 报国))
                    
                        (DEG 之))
                    
                      (NP 
                        (NN 力)))))))
                    
            (PU ，)
                    
            (VP 
              (ADVP 
                (AD 很))
                    
              (VP 
                (VE 有)
                    
                (NP-OBJ 
                  (NN 意义))))))))
                    
    (PU 。)) )
arg0: 
                    *T*-1