Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "RT @IBMWatson: Welcome @Apple, #ACLU, #AAAI, @macfound, @UCBerkeley, @OpenAI, @PIIE to the @PartnershipAI board of Trustees! Info:… 
" STOCK: Apple DATE: 31/01/2017
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 1.0.