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].

Ex 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.

Ex Output:
BPA


Ex Input:
(CNN) This is the story of a little PO box in Northern Virginia and the conspiracy that wasn't. When the Republican presidential primary was still in full swing in March, officials from Donald Trump's campaign promoted a conspiracy theory -- one of many -- insisting there was a nefarious link between his political opponents and an anti-Trump super PAC. It began this spring when a group called Make America Awesome, an anti-Trump group, posted a photo of Trump's wife, Melania, that criticized her for posing semi-nude in a magazine photo shoot. Trump responded by crudely lambasting the physical appearance of Ted Cruz's wife, Heidi, and he justified it by claiming that Cruz was behind the attack on his own wife.Why do many campaigns and Super PACs share the same PO box?The reason is a lot less interesting than the conspiracy that has been alleged 
 Question:Because those groups listed the same address, they claimed it was proof that the anti-_ forces were operating from the same source.

Ex Output:
Donald Trump


Ex Input:
(CNN) A Yazidi woman who fled ISIS counted on reuniting with her husband after he found asylum in the United States. But she was barred from boarding a flight out of Iraq. A medical student in West Virginia is concerned his father won't be able to return home after attending a funeral in Iran. And an elderly Iraqi man's trip to see his son and daughter was abruptly halted in Qatar when he was put back on a plane to Baghdad. These are just a few of the families whose lives are in limbo after President Donald Trump's executive order limiting immigration from seven Muslim-majority countries. They express fears for what the future will hold for them and their loved ones. Here are their stories:Dallal fled ISIS but can't see her husband in the United StatesSusan, an Iraqi-American, worries for relatives seeking US asylumMohammed Al Rawi's father was turned back while en route from Baghdad 
 Question:The three youngest children who are minors aged 7, 8 and 16 have _ passports and have been told they can enter the country.

Ex Output:

United States