In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .

(CNN) Electronic waste is (literally) a mounting crisis in Africa. Digital dumps made of junk phones, computers and TVs shipped mostly from richer Western countries are growing across Africa, burned producing unhealthy and hazardous gasses. The problem is only getting worse. Fortunately, though, there are those working at a community level to raise awareness about e-waste and put it to some good use. An innovative lab in Lomé, the capital city of Togo in West Africa, is one such group. They've created the first "Made in Africa" 3D printer using e-waste. WoeLab, a community tech hub established by architect Sénamé Koffi Agbodjinou, 37, made the machine using little more than scrap printers, computers and scanners.A lab in Togo, West Africa, is behind 3D printer made from e-wasteCreators say it is the first 'Made in Africa' 3D printer
Now they have 20 finished products and other labs in _ are following suit.

(CNN) -- As outrage over the shooting death of 17-year-old Trayvon Martin continues to grip the nation, key questions remain unanswered over what happened the night of February 26 as conflicting accounts are given by witnesses and attorneys for both sides. What is known is that Martin, wearing a hoodie, ventured out from his father's fiancee's home in Sanford, Florida, to get a snack at a nearby convenience store. As he trekked back to the home with a bag of Skittles and an Arizona iced tea, he was shot and killed by George Zimmerman, a 28-year-old neighborhood watch volunteer. Martin was unarmed. Zimmerman has said he acted in self-defense.A witness speaks to CNN for a second time, offering new details of the shootingShe says she is certain it was a younger voice yelling for helpMembers of Zimmerman's legal team question the witness' recollection
Martin's relatives have said they are certain the voice heard on the 911 call is _'s.

(CNN) Chad Pregracke may be known as "The Rivers' Garbageman," having cleaned up America's waterways for almost 20 years. But there's one thing he loves just as much as spending time on the banks of the Mississippi: planting trees. "Trees are a great thing for the environment," said Pregracke, the CNN Hero of the Year in 2013. "It has a lasting impact." So, in 2007, he and his nonprofit, Living Lands & Waters, set a new goal: to plant 1 million oak trees in communities across the country. This morning, the organization reached this major milestone. "There are a million trees planted out there," Pregracke said. "It's a really big deal. We probably have 800,000 different families watching those trees grow up, and I think it's really impactful and really cool ... like leaving a legacy."2013 CNN Hero Chad Pregracke and his nonprofit, Living Lands & Waters, planted their 1 millionth treeDan Wallrath, a 2010 Top 10 CNN Hero, celebrated the 100th home built by his nonprofit, Operation Finally Home2009 Top 10 Hero Andrea Ivory's group, the Women's Breast & Heart Initiative, celebrates its 10th anniversary

Highlights of the ceremony included an 11-foot walking "Treeman" and _'s speech to the students, which carried a message about setting goals.