Original sentence: Although they were no the first Europeans in the Philippines, the first recorded arrival of Europeans in the archipelago was the Spanish expedition led by Portuguese-born Spanish explorer Ferdinand Magellan, which first sighted the mountains of Samar at dawn on 16 March 1521 (Spanish calendar)
Edited sentence: Although they were not the first Europeans in the Philippines, the first recorded arrival of Europeans in the archipelago was the Spanish expedition led by Portuguese-born Spanish explorer Ferdinand Magellan, which first sighted the mountains of Samar at dawn on 16 March 1521 (Spanish calendar)