As the terms denoting this allowance vary, it may sometimes remain unclear whether fathers have any entitlements at all, and if so, to what exactly they are entitled.
It may sometimes remain clear that fathers have many entitlements.
The original text says, "it may sometimes remain unclear whether fathers have any entitlements at all" so it cannot also remain clear that fathers have many entitlements.
( z1 possible :ARG1 ( z2 remain :ARG1 ( z3 clear :ARG1 ( z4 entitle :ARG2 ( z5 person :ARG0-of ( z6 have-rel-role :ARG2 ( z7 father ) ) ) :quant ( z8 many ) ) ) :frequency ( z9 sometimes ) ) )