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<http://webisa.webdatacommons.org/6839398>	<http://www.w3.org/ns/prov#value>	"As a pianist in Signal Ensemble, Hagen has appeared at venues ranging from Columbia University???s Miller Theatre, the Ojai Music Festival, the June in Buffalo Festival, and the Festival of Contemporary Music at Tanglewood to the Bang on a Can Marathon and Le Poisson Rouge in NYC. Hagen has worked closely with composers such as Steve Reich, Helmut Lachenmann, Charles Wuorinen, and Oliver Knussen." .
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