Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "RT @BianchiOfficial: Bianchi proudly collaborated with @Starbucks Reserve Roastery Milan, producing an exclusive and World-unique gravel bi…

" STOCK: Starbucks DATE: 10/09/2018
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 0.8.