Given the task definition and input, reply with output. This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.

Passage: A questionable role in the rebellion was played by Leonard Dacre, an early sympathiser of Mary. At the outbreak of the rebellion, he travelled to Elizabeth's court at Windsor to claim the heritage of his young nephew, the 5th Baron Dacre. After the latter's untimely death in 1569, this had descended to his sisters, all married to sons of the Duke of Norfolk. Dacre returned to Northern England, ostensibly a faithful partisan of Elizabeth, but his intentions remain unclear. After the retreat of the rebels, he seized Greystoke Castle and fortified his own Naworth Castle, where he gathered 3,000 Cumbrian troops and tried to keep up the appearance of good relations with the Queen. He held out against a siege of the royal army under Baron Hunsdon but then attacked the retreating army at Gelt River. Though Hunsdon was outnumbered, he charged Dacre's foot with his cavalry, killing 300-400 and capturing 200-300 men. Dacre escaped via Scotland to Flanders, where he died in exile.
Question: How many minimum did Though Hunsdon kill at Gelt River?
Answer type: Number
300.