Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "20% OFF #sale #save #basketball #hoop @amazon Silverback NXT 50" Backboard Portable Height-Adjustable Basketball Ho… https://t.co/505jm7UwcB

" STOCK: Amazon DATE: 21/10/2018
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.