Complex sentence: He is a former director of the Institute for Logic, Language and Computation (ILLC) at the University of Amsterdam and a member of the group collectively publishing under the pseudonym L. T. F. Gamut.
Split into simpler sentences: He is a member of the Institute for Logic, Language and Computation (ILLC) at the University of Amsterdam. Groenendijk is a member of the group collectively publishing under the pseudonym L. T. F. Gamut.