Complex sentence: Dr. David offered art-making to hospital staff to convey their feelings and subsequently with colleagues at the American Art Therapy Association to sponsor an exhibit on Capitol Hill of art work created after and about 9/11 Betts, D. (Webmaster).
Split into simpler sentences: Dr. David offered art-making to hospital staff to convey their feelings. She subsequently collaborated with colleagues at the American Art Therapy Association to sponsor an exhibit on Capitol Hill of art work created after and about 9/11 Betts, D. (Webmaster).