In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Example Input: (CNN) Your "BPA-free" plastic product may be no safer than the product it replaced, says a new UCLA study that analyzed the impact of a common BPA alternative on zebra fish embryos. The study joins a small but growing group of similar research sounding the alarm about so called "BPA-free" alternatives. "Our findings are frightening and important," said senior author and reproductive endocrinologist Nancy Wayne. "Consider it the aquatic version of the canary in the coal mine." After decades of animal research linked BPA (Bisphenol A), a known endocrine disruptor, to problems with brain and reproductive development, early puberty and a rise in breast and prostate cancer, many manufacturers stopped using the chemical to harden plastics, replacing it with "BPA-free" alternatives. The most common replacement is BPS (Bisphenol S), said Wayne.BPA-free alternatives may be no safer than BPA, say researchersMost common alternative, BPS, linked in study to disruptions of estrogen and thyroid hormones 
 Question:In addition to the effect on estrogen, the study also found both _ and BPS affected the thyroid hormone system.
Example Output: BPA

Example Input: (CNN) -- The Washington Post's Chris Cillizza recently gave President Barack Obama his "Worst Year in Washington" award. Indeed, Cillizza wrote that there was a growing sense among the public that "Obama simply isn't up to the job to which he was elected twice." But while it's hard to argue that Obama has not had a difficult 12 months, the notion that this President is somehow done or a lame duck just doesn't feel quite right. The fact is the office of the president is still the most dynamic change agent in our political system. And unlike Congress or the Supreme Court, which go in and out of session, the President is on 24/7, with significant power at his disposal, a point underscored by recent initiatives on immigration, climate change and Cuba.Aaron David Miller: President Obama is not the appeaser in chief his detractors claimMiller: President doubled down in Afghanistan in 2009, had Osama bin Laden killedObama is a committed internationalist, Miller saysPresident can feel the pull of wanting to leave a positive legacy, he says 
 Question:"My presidency's entering the fourth quarter," _ said in a press conference Friday.
Example Output: Barack Obama

Example Input: After three days training amid the bright lights, bingo and all-day breakfasts of Benidorm, Roy Hodgson has decided to stay away from the full English. Not as we have come to know it anyhow. There will be no Wayne Rooney against Spain, with the captain rested, and Hodgson has reframed the nature of these two friendlies amid injuries. They had been billed as the chance to fine-tune his strongest team, but last night the England boss claimed it was more about looking into certain individuals, partnerships and chemistry. This was back to the language which preceded depressing defeats by Germany and Chile in November 2013, when things started to unravel soon after a promising World Cup qualification campaign.Wayne Rooney is going to be rested by England for the Spain friendlyHarry Kane will lead England's attack, with Jamie Vardy missing injuredRoss Barkley is set to play behind Kane as an attacking midfielder 
 Question:Vardy had been earmarked to play centre forward against _.
Example Output:
Spain