Complex sentence: Bateson would have a profound influence on Bandler's future, introducing him and Grinder to Milton Erickson; together, the three of them formed some of the foundational models for Neuro-linguistic programming.
Split into simpler sentences: Bateson would have a profound influence on Bandler's future, introducing him and Grinder to Milton Erickson. Together Bandler, Grinder, and Erickson formed some of the foundational models for Neuro-linguistic programming.