Problem: Context: A Russian Soyuz spacecraft docked with the International Space Station, after a two-day flight from the Baikonur Cosmodrome in Kazakhstan.
Soyuz spacecraft were built by Russia.
A: yes

Problem: Context: Experimenting on a raft anchored on the river Elbe, Alfred Nobel tries to make nitroglycerine safer to handle. Finds that the addition of kieselguhr turns nitroglycerine into a dough that can be kneaded, and calls it "dynamite".
Alfred Nobel is the inventor of dynamite.
A: yes

Problem: Context: The results of numerous epidemiological studies and recent clinical trials provide consistent evidence that diets rich in fruits and vegetables can reduce the risk of chronic disease.
Fruits and vegetables prevent osteoporosis.
A: no

Problem: Context: Mexico's new president, Felipe Calderon, seems to be doing all the right things in cracking down on Mexico's drug traffickers. He's appointed new people to key military and criminal justice positions, deployed troops to quell drug violence, reasserted federal police power, extradited a few major traffickers to the United States, and given a green light to legislation clarifying Mexico's drug laws. But all this provides little reason to hope that Mexico has really turned a corner in its efforts to control the illegal drug trade. For a guide to what's in store, one need only look at past sexenios (the six year terms of Mexican presidents).
Felipe Calderon is the President of Mexico.
A:
yes