Q: 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: Henry XVI already had a dispute with Louis VII's father Stephen III. On 17 April 1414, Henry and other enemies of Louis VII founded the Parakeet Society. On 8 July 1415, the society was changed into the League of Constance, an alliance for mutual defense against Louis VII. In 1417 in Constance, Louis insulted Henry by calling him "the son of a cook". When Louis then accused Henry of having shed human blood, Henry and fifteen of his followers physically attacked Louis and injured him severely. After this attack, Louis described Henry as a pluethunt , which did little to defuse the conflict. Henry XVI evaded punishment for the attack on Louis VII only through the intercession of Frederick of Brandenburg and his cousins Dukes Ernest and William III in Munich and especially by paying 6000 guilders to King Sigismund. Henry XVI wanted revenge. The conflict escalated into a war when an army from Bavaria-Ingolstadt burned down the castle of the Burgrave of Nuremberg. John III, who had succeeded his brother William II as Duke of Bavaria-Straubing in 1418, remained neutral.
Question: How many days after its founding was the Parakeet Society changed into the League of Constance?
Answer type: Number
A:
447.