Complex sentence: Many of the segregation academies in Virginia eventually closed; others changed their missions, and eliminated discriminatory policies, many only after the Internal Revenue Service (IRS) revoked the tax-free status of non-profit discriminatory private schools.
Split into simpler sentences: Many of the segregation academies in Virginia eventually closed; others changed their missions and eliminated discriminatory policies. Some yielded on integration only after the Internal Revenue Service (IRS) revoked the tax-free status of non-profit discriminatory private schools.