{HEAD ~ This invention} relates to {TAIL ~ a method} for the storage of hydrogen in subterranean carbonaceous formations and, more particularly, to the storage of hydrogen in coal beds which have been at least partially depleted of methane 
relates to
{ HEAD ~ This invention } relates to { TAIL ~ a method } for the storage of hydrogen in subterranean carbonaceous formations and , more particularly , to the storage of hydrogen in coal beds which have been at least partially depleted of methane
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