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You can have a look through the agent's accepted submission types here: http://www.webook.com/literary-agents/listAllAgents.aspx
I haven't spotted any screenplays specifically, but perhaps it might be worth submitting to an agent within the genre of your screenplay, rather than to an agent that accepts screenplays specifically. Even if they don't work with screenplays specifically, if they like it they may very well be able to offer some advice on where and who else to submit to.
Thanks and best of luck,
Hannah from the WEbook Team