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: After the Polish-Lithuanian-Teutonic War of 1410-1411 not all issues between the Grand Duchy of Lithuania and Teutonic Knights were settled. The most contentious matter was the border between Samogitia and Prussia. Grand Duke of Lithuania Vytautas the Great demanded the entire right bank of the Neman River including the town of Memel . The Knights demanded that after deaths of Vytautas and Jogaila, King of Poland, Samogitia would pass to them. Sigismund, Holy Roman Emperor, agreed to mediate the dispute and appointed Benedict Makrai to hear the arguments. On 3 May 1413, Benedict made the decision and recognized the right bank of the Neman River, including Klaipeda, to Lithuania. The Knights refused to accept this decision and Teutonic Grand Master Heinrich von Plauen ordered Teutonic armies into northern Poland. The army, commanded by Michael Kuchmeister von Sternberg, returned into Prussia after just 16 days of campaign. The knights did not believe that the Order, still recovering from the defeat in the Battle of Grunwald in 1410, was ready for another war with Poland. Kuchmeister deposed von Plauen and became the Grand Master. He attempted to reopen the negotiations with Poland in May 1414. As King Jogaila demanded to reinstate von Plauen and refused any attempts at a compromise, the talks broke down.
Question: The Battle of Grunwald was how many years before Benedict made the decision and recognized the right bank of the Neman River?
Answer type: Number
3.