The ratio of the MI2 of fraction to {HEAD ~ the MI5} of {TAIL ~ fraction} may exceed 25000, or even 30000 
of
The ratio of the MI2 of fraction to { HEAD ~ the MI5 } of { TAIL ~ fraction } may exceed 25000 , or even 30000
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH