Complex sentence: One example of this policy was the second Morrill Act (Morrill Act of 1890), which implicitly (perhaps inadvertently) accepted the legal concept of separate but equal for the 17 states which had institutionalized segregation.
Split into simpler sentences: One example of this policy was the second Morrill Act (Morrill Act of 1890). The 1890 Act which implicitly accepted the legal concept of separate but equal for the 17 states which had institutionalized segregation.