Original sentence: Santa Cruz de Tenerife is the second biggest city in the archipelago, the capital of the island and the head of the cabildo insular (island government); it is also officially co-capital of the autonomous community of the Canary Islands  together with Las Palmas de Gran Canaria, with whom it shares governmental institutions such as Presidency, Parliament and ministries.Tenerife, a Spanish island, is the largest of the seven Canary Islands in the Atlantic Ocean off the coast of Africa.The highest point of Spain, Teide (3 717 m), is on this island
Edited sentence: Santa Cruz de Tenerife is the biggest city in the archipelago, the capital of the island and the head of the cabildo insular (island government); it is also officially co-capital of the autonomous community of the Canary Islands, with whom it shares governmental institutions such as Presidency, Parliament and ministries.Tenerife its the most important island of Canary islands.Tenerife, is the most important island of Canary Islands, the most largest of the seven Canary Islands in the Atlantic Ocean off the coast of Africa.The highest volcano point of Europe, Teide (3 718 m), is on this island