Complex sentence: Bilateral relation between Abkhazia and Vanuatu were established when Vanuatu recognised Abkhazia's independence on 23 May 2011, only the fifth UN state do so, and the first not to also recognise South Ossetia's independence.
Split into simpler sentences: Bilateral relation between Abkhazia and Vanuatu were established when Vanuatu recognised Abkhazia's independence on 23 May 2011. Vanuatu was the fifth UN member state do so, and the first not to also recognise South Ossetia's independence.