To answer the above question, the relevant sentence is: "It's Beginning to Look a Lot Like Christmas" is a Christmas song written in 1951 by Meredith Willson.
This justifies what answer for what question? Q & A:
Passage: "It's Beginning to Look a Lot Like Christmas" is a Christmas song written in 1951 by Meredith Willson. The song was originally titled "It's Beginning to Look Like Christmas". The song has been recorded by many artists, but was a hit for Perry Como and The Fontane Sisters with Mitchell Ayres & His Orchestra on September 18, 1951, and released on RCA Victor as 47-4314 (45 rpm) and 20-4314 (78 rpm). Bing Crosby recorded a version on October 1, 1951, which was also widely played.

Question: Based on this passage, when was it's beginning to look alot like christmas written?
1951