Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "1st reaction: gobsmacked. 2 seconds later: no, this is actually entirely believable. Someone help USA https://t.co/m92tVi8OTs via @Reuters
" STOCK: Reuters DATE: 28/04/2017
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.