input with options: Is this product review positive? Title: Nigerians Label Oyibo a "419" Mathematician Review: Crank Dot Net gave Oyibo its highest rating - a five star or "CRANKIEST." Crank Dot Net is the authority on "cranks, crackpots, kooks and loons on the net."The National Mathematical Centre, Abuja, Nigeria denounced Oyibo as a FRAUD. [This Day (Nigeria) - December 27, 2004, allafrica dot com] Answer:
output: No

input with options: Is this product review positive? Title: Marey hot water heater Review: We were unable to use this product due to wattage differences. We attempted to contact the company via e-mail and phone. We wish to return this item. If you can help us do that it would be much appreciated. Answer:
output: No

input with options: Is this product review positive? Title: Big help Review: This book I read in christmas and it has been a very good help for me to write the end of a book I am working with. In fact if you write a beginning you have the end. That's what the books says. Now I have given the book to two in my writing group and they also think it is excellent. I never saw any other book on this subject. Answer:
output: Yes

input with options: Is this product review positive? Title: has not been received Review: I received an e-mail from the seller, saying they had shipped the book. I have not yet received it. I e-mailed the seller & they said to wait until March 19 to write them again. I will write them today also. I wanted to give it as a gift on Sunday (for my brother's birthday). Now I will have to go shopping for something else. Answer:
output: