Wal-Mart Stores has asked a US federal appeals court to review a judge's order approving class-action status for a sex-discrimination lawsuit.
There are law suits involving Wal-Mart.
( z1 sue :ARG2 ( z2 law ) :ARG2-of ( z3 involve :ARG1 ( z4 company :name ( z5 name :op "Wal-Mart" ) ) ) )