Complex sentence: The group was initially formed by Tod R. Lauer, then a first year postdoc, at a meeting in Princeton in June 1985 at which time Sandra Faber was elected the group leader.
Split into simpler sentences: The group was initially formed by Tod R. Lauer, then a first year postdoc. At the first meeting of the group held at Princeton University in June 1985, Sandra Faber was elected the group leader.