The sale was made to pay Yukos' US$ 27.5 billion tax bill, Yuganskneftegaz was originally sold for US$ 9.4 billion to a little known company Baikalfinansgroup which was later bought by the Russian state-owned oil company Rosneft .
Yukos has a significant unpaid tax bill.
( z1 have :ARG0 ( z2 company :name ( z3 name :op "Yukos" ) ) :ARG1 ( z4 bill :ARG1-of ( z5 significant ) :ARG1-of ( z6 pay :polarity - :ARG3 ( z7 tax ) ) ) )