Complex sentence: A memorial service was held at Alexander Hall at Princeton University a week later, attended by 600 of his scientific, political and military associates that included Bethe, Groves, Kennan, Lilienthal, Rabi, Smyth and Wigner.
Split into simpler sentences: A memorial service was held a week later at Alexander Hall at Princeton University. The service was attended by 600 of his scientific, political and military associates that included Bethe, Groves, Kennan, Lilienthal, Rabi, Smyth and Wigner.