Generate a correct and concise answer for the question based on the words in the context.
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Question: Context : ``Cleaning House'' is the second episode of the sixth season of the CBS sitcom How I Met Your Mother, and the 114th episode overall. 
Question : Which series was Cleaning House in?

Answer: How I Met Your Mother


Question: Context : ISO 3166-2:KN is the entry for Saint Kitts and Nevis in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Question : Who set the standards for ISO 3166-2:KN?

Answer: International Organization for Standardization


Question: Context : The PIAT was designed in 1942 in response to the British Army's need for a more effective infantry anti-tank weapon, and entered service in 1943. 
Question : What year was PIAT made?

Answer:
1942