Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "RT @AstraZeneca: Mark is Chief Scientist in oncology IMED in Cambridge, UK, heading up the DDR biology area. https://t.co/g3kA1YBVjM… 
" STOCK: AstraZeneca DATE: 28/02/2017
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 0.0.