Task: Question Generation
Input (English): Passage: The Dutch East India Company  fleet from Batavia sailed at the end of 1620. The fleet consisted of 19 ships, 1,655 European troops and 286 Asian auxiliaries, and was led by Governor-General Jan Pieterszoon Coen. On 21 February 1621, The fleet arrived in Fort Nassau, where it was reinforced by the fort's 250-strong garrison and 36 indigenous vessels. After unsuccessfully trying to recruit Englishmen from the nearby Run and Ay islands, Coen began sending scouts to the coastline of Lontor, the main Bandanese island. The reconnaissance took two days, during which some boats came under cannon fire from the native defenders. The scouts found fortified positions along the Southern coast and in the hills and failed to find a possible beachhead. On 7 March, a VOC probing party landed in the island but was repulsed after suffering one dead and four wounded. On 11 March he ordered a decisive assault. He divided his forces into several groups, which attacked different points in the island. The invaders swiftly captured key strongholds, and by the end of the day the island's northern lowlands and southern promontories. The defenders and local population fled to the hills that made up the island's center, with the Dutch forces in pursuit. By the end of 12 March, the Dutch occupied the whole island, suffering six dead and 27 wounded.
Output (English): How many days after the fleet arrived in Fort Nassau did a VOC probing party land on the island?