Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "#VIphv We are delighted to have ALEXANDRE KIAZAND, Global #Head #Safety #Science, @AstraZeneca on board as a speake… https://t.co/XXo6NS2JOf

" STOCK: AstraZeneca DATE: 03/09/2018
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 0.35.