Complex sentence: In 1998, Hawaiians amended their state constitution to prevent the judicial introduction of same-sex marriage, however the constitution is silent on civil unions and does not prevent the legislature from introducing either same-sex marriage or civil unions.
Split into simpler sentences: In 1998, Hawaii amended its state constitution to prevent the judicial introduction of same-sex marriage. However, the constitution is silent on civil unions and does not prevent the legislature from introducing either same-sex marriage or civil unions.