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During the period from 1992 to 1999 he was a visiting scientist at the University of Pittsburgh , Physikalische Institute ( University of Heidelberg ) and Lawrence Berkeley National Laboratory ( LBNL ) where he worked on anisotropic flow and event-by-event physics in nuclear collisions at SPS and RHIC .
 organization: University of Pittsburgh; organization: University of Heidelberg
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: University of Pittsburgh; organization: University of Heidelberg