Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "Ding ding ding - we have a winner! 🎉Congrats to Britt of @BIDMCneo, the winner of our $100 @amazon gift card giveaw… https://t.co/lcZG8hiWjl

" STOCK: Amazon DATE: 19/10/2018
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 0.0.