Today, he often plays hour-long solos without any repetition, leaving audiences speechless.

WHITEHOUSE: Kennedy Center Honorees at The White House 2011

The linearity of the core story becomes clear during a second playthrough, but here the relatively short duration of each episode is a strength: it is possible to take different sides and pick different fights to elicit different responses over the episode without finding the situational repetition tedious over these short stretches.

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Without claiming to explain what probably nobody can explain, Ms Wullschlager records Chagall's artistic slide into repetition, pastiche and sentimentality.

ECONOMIST: Marc Chagall