Task: Sentiment_Analysis


system
You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user
Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Customer Review: I had heard about HEPA air purifiers before but hadn't found one that fit my budget or my needs exactly.  I recently moved into a corner apartment in a high-rise building.  Apparently, my next door neighbor smokes in his apartment, and everytime he "lights up," I could smell his cigarette smoke in our bedroom.  Plus, this apartment had wall-to-wall carpeting which seemed to be worsening my severe allergies and asthma.  So after doing some extensive research, I decided on this model.  I bought two units, one for our bedroom and the other for our living room - and overnight - no more second-hand smoke!  My wheezing and other allergic symptoms practically disappeared as well.  The automatic sensor mode is very good - it is very sensitive.  When I make our bed in the morning, it actually "kicks into" higher mode due to all the dust the bed-making is causing.  I've been so happy with these that I bought 2 for my parents' apartment as well.  They had moved into an apartment that had recently been painted and ever since they started to use the air filters, they don't smell the new paint smell anymore.  Overall, I have absolutely loved these filters.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative

Customer Belief: Customer believes the neighbor's smoking causes second-hand smoke in their bedroom. Customer believes the apartment's carpeting exacerbates their severe allergies and asthma. Customer believes the purchased air purifiers effectively eliminated smoke and allergy symptoms. Customer believes the automatic sensor mode is sensitive and functional. Customer believes the air purifiers helped their parents with paint smell issues.
Customer Desire: Customer desires to eliminate second-hand smoke (Tranquility). Customer desires to alleviate allergies/asthma (Tranquility). Customer desires to conduct thorough research before purchasing (Curiosity). Customer desires to improve their parents' living conditions (Family).
Customer Intention: Customer intends to purchase two air purifiers for their own apartment. Customer intends to rely on the automatic sensor mode for air quality control. Customer intends to buy additional units for their parents. Customer intends to continue using the product due to satisfaction.


assistant

Answer: A: very positive