Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "1 day left (!) to register for Green Bonds Event, with keynote speaker Mike Eckhart of @Citi &amp; two panels of expert… https://t.co/1L1Ie1LVP5
" STOCK: Citigroup 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 0.0.