Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "Lone 18-year-old kills 18 people, many of them teens, in shooting and bomb attack at college, Rus... https://t.co/tnaNQclGpU via @Yahoo

" STOCK: Yahoo DATE: 18/10/2018
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 0.5.