+-----------SUBJ:V_PASS-N-----------+                                                                 
            +--MOD_ATT:N-N--+--------APPOS--------+             |                            +-----COMP_of:N-N----+               
     +MOD_AT+        +MOD_AT+--APPOS--+           |             +----COMP_during:V_PASS-N----+          +MOD_ATT:N+COMP_in:N-+    
     |      |        |      |         |           |             |                            |          |         |          |    
Two RNA polymerase sigma factors , GENEXXX and GENEXXX , are produced during the first two hours of endospore formation in SPXXX .
COMP_of:N-N (hours,formation)
MOD_ATT:N-N (factors,sigma)
MOD_ATT:N-ADJ (formation,endospore)
MOD_ATT:N-N (factors,polymerase)
COMP_in:N-N (formation,SPXXX)
APPOS (factors,GENEXXX)
MOD_ATT:N-N (polymerase,RNA)
SUBJ:V_PASS-N (produced,factors)
APPOS (factors,GENEXXX)
COMP_during:V_PASS-N (produced,hours)