UPDATE 1-Obama takes in Hamlet as Britain celebrates Shakespeare's 400th anniversary

LONDON/STRATFORD-UPON-AVON, England, April 23 (Reuters) -

U .S. President Barack Obama marked the 400th anniversary of

Shakespeare's death on Saturday by visiting the Globe theatre in

London for a performance of a scene from Hamlet, where the

Danish prince poses the question: "To be or not to be".

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