The method 200 may be performed on {HEAD ~ each e mail} in {TAIL ~ the plurality} of e mails 
in
The method 200 may be performed on { HEAD ~ each e mail } in { TAIL ~ the plurality } of e mails
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH