Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "Join my free Yahoo Daily Fantasy Contest, NFL Yahoo Cup Round 1 [$3K Freeroll]: https://t.co/WUC4gQG5jz via @Yahoo

" STOCK: Yahoo DATE: 06/09/2018
Sentiment: (Provide sentiment here)
Explanation: The tweet sentiment is related to the stock mentioned, and it's important to interpret the context. The LSTM polarity score is 1 and the TextBlob polarity score is 0.0666666666666666.