TASK DEFINITION: Generate a correct and concise answer for the question based on the words in the context.
PROBLEM: Context : The QBZ-95 was first observed outside China on 1 July 1997, when the United Kingdom transferred the sovereignty of Hong Kong to the People's Republic of China. 
Question : What year was QBZ-95 commissioned?

SOLUTION: 1997

PROBLEM: Context : Nancy Talbot died from complications of Alzheimer's disease on August 30, 2009, at her home in Boulder, Colorado, at the age of 89. 
Question : What led to Nancy Talbot's death?

SOLUTION: Alzheimer's disease

PROBLEM: Context : Nicholas Rodda (born 11 October 1992) is a male former water polo player from South Africa. 
Question : Is Nicholas Rodda a male or female?

SOLUTION:
male