Context_1 : Nofoali'i is a small village on the Samoan island of Upolu. It is located on the northwestern coast of the island between Fasitoo Uta and Leulumoega. It is the sixth village from Faleolo International Airport. Context_2 : Apia is the capital and the largest city of Samoa. From 1900 to 1919, it was the capital of German Samoa. The city is located on the central north coast of Upolu, Samoa's second largest island. Apia is the only "city" in Samoa and falls within the political district ("itūmālō") of Tuamasaga. Context_3 : Vaiee is a small village on the Samoan island of Upolu. It is located on the central south coast of the island. Context_4 : Siuniu is a small village on the Samoan island of Upolu. It is located inland from the southeast coast of the island. Context_5 : The Second Samoan Civil War was a conflict that reached a head in 1898 when Germany, the United Kingdom, and the United States were locked in dispute over who should have control over the Samoan island chain, located in the South Pacific Ocean. At the war's conclusion in 1899, the United States was granted the eastern section of the islands, the Germans were granted the western section of the islands, and the British were given other Pacific island chains formerly belonging to Germany. The German half is now an independent nation - Samoa. The American half has voluntarily remained under the control of the American government as the territory of American Samoa. Context_6 : George Pisi (born 29 June 1986 in Apia, Samoa) is a rugby union player for Samoa who will leave his current club Northampton Saints in the Aviva Premiership at the conclusion of the 2016/17 season. Context_7 : The Samoan woodhen ("Gallinula pacifica"), also known as Samoan wood rail, is a nearly flightless rail endemic to the Samoan island of Savai'i, and probably extinct. As it has evolved adaptations for a more terrestrial lifestyle and at least partly nocturnal habits, it is probably better placed in a distinct genus, "Pareudiastes" (which sometimes includes the more distinct Makira wood rail too), but this issue has not yet been thoroughly researched. It was known as puna'e ("one that jumps up") to the native Samoans; this was said to relate to the bird's habit of making a jumping dash into cover when startled from its resting place. Context_8 : Saleimoa is a small village on the Samoan island of Upolu. It is located on the northwestern coast of the island. Context_9 : Vaiusu is a small village on the Samoan island of Upolu. It is located on the central-north coast of the island, to the west of the capital Apia. As of late 2010, Vaiusu had an estimated population of 2,043. Its neighboring villages are Vaigaga, Elisefou, Vaitele, Talimatau, Vailoa, and Emau. Context_10 : Malua is a small village on the Samoan island of Upolu. The name originates from the Samoan word "Maluapapa" which is translated 'shelter under the rock'. It is located on the northwestern coast of the island in the electoral constituency ("faipule district") of Sagaga Le Falefa which forms part of the larger political district Tuamasaga. The village is part of the electoral constituency ("Faipule District") Gaga'emauga III which forms part of the larger political district of Gaga'emauga. fact_1 : George Pisi (born 29 June 1986 in Apia, Samoa) is a rugby union player for Samoa who will leave his current club Northampton Saints in the Aviva Premiership at the conclusion of the 2016/17 season. fact_2 :  The city is located on the central north coast of Upolu, Samoa's second largest island. Question: What Samoan island was George Pisi born on?
Output: Upolu