RosettaCodeData/Task/Remove-duplicate-elements/AppleScript/remove-duplicate-elements-2.applescript

{1, 2, 3, {4, 5}} contains {2, 3} --> true
{1, 2, 3, {4, 5}} contains {4, 5} --> false
{1, 2, 3, {4, 5}} contains {{4, 5}} --> true