Complex sentence: Another project of the 1960s was a collaboration with Alan Lomax and Forrestine Paulay--the Choreometrics project--which took Bartenieff into cross-cultural studies of movement expressed in work and dance activities.
Split into simpler sentences: Another project of the 1960s was the Choreometrics project, which was a collaboration with Alan Lomax and Forrestine Paulay. This project took Bartenieff into cross-cultural studies of movement, expressed in work and dance activities.