In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Ex Input:
Passage: Curiously, it appears that the Greeks did not "breed" their slaves, at least during the Classical Era, though the proportion of houseborn slaves appears to have been rather large in Ptolemaic Egypt and in manumission inscriptions at Delphi. Sometimes the cause of this was natural; mines, for instance, were exclusively a male domain. On the other hand, there were many female domestic slaves. The example of African slaves in the American South on the other hand demonstrates that slave populations can multiply.Xenophon advised that male and female slaves should be lodged separately, that "nor children born and bred by our domestics without our knowledge and consentno unimportant matter, since, if the act of rearing children tends to make good servants still more loyally disposed, cohabiting but sharpens ingenuity for mischief in the bad." The explanation is perhaps economic; even a skilled slave was cheap, so it may have been cheaper to purchase a slave than to raise one. Additionally, childbirth placed the slave-mother's life at risk, and the baby was not guaranteed to survive to adulthood.Houseborn slaves (oikogeneis) often constituted a privileged class. They were, for example, entrusted to take the children to school; they were "pedagogues" in the first sense of the term. Some of them were the offspring of the master of the house, but in most cities, notably Athens, a child inherited the status of its mother.
Question: What were entrusted to take children to school?

Ex Output:
oikogeneis.

Ex Input:
Passage: There are over 40 species of mammals in the Pine Creek Gorge. Leonard Harrison State Park's extensive forest cover makes it a habitat for "big woods" wildlife, including white-tailed deer, black bear, wild turkey, red and gray squirrels. Less common creatures include bobcats, coyote, fishers, river otters, and timber rattlesnakes. There are over 26 species of fish in Pine Creek, including trout, suckers, fallfish, and rock bass. Other aquatic species include crayfish and frogs.Several species have been reintroduced to the gorge. White-tailed deer were imported from Michigan and released throughout Pennsylvania to reestablish what had once been a thriving population. The current population of deer in Pennsylvania are descended from the original stock introduced beginning in 1906, after the lumberman had moved out of the area. The deer population has grown so much that today they exceed their carrying capacity in many areas. River otters were successfully reintroduced in 1983 and now breed in the gorge. Despite the fears of anglers, their diet is only 5 percent trout.Fishers, medium-sized weasels, were reintroduced to Pine Creek Gorge as part of an effort to establish a healthy population of fishers in Pennsylvania. Prior to the lumber era, fishers were numerous throughout the forests of Pennsylvania. They are generalized predators and will hunt any smaller creatures in their territory, including porcupines. Elk have been reintroduced west of the gorge in Clinton County and occasionally wander near the west rim of the canyon. Coyotes have come back on their own. Invasive insect species in the gorge include gypsy moths, which eat all the leaves off trees, especially oaks, and hemlock woolly adelgids, which weaken and kill hemlocks. Invasive plant species include purple loosestrife and Japanese knotweed.
Question: What is the full name of the place that has gypsy moths?

Ex Output:
Pine Creek Gorge.

Ex Input:
Passage: Although Moran's transition as The Wiggles' lead singer was "smooth" for the young children of their audience, it was more difficult for their parents. Moran said that "most children understood". Field reported that by the group's 20th anniversary in 2011, due to the ever-changing nature of their audience, most of their young fans were unfamiliar with Page. Cook stated that Moran's transition was challenging for the group because since he replaced their lead singer, it changed their sound. Fatt characterised Moran's singing style as more operatic, so they chose different keys to sing and perform. The Wiggles never publicly disclosed how much Moran was paid, but it was reported that he earned $200,000 per year. Moran was featured in his first DVD and CD as a member of the group in early 2008, and a sixth season of The Wiggles' television series featuring Moran was filmed and began airing in Australia.At the end of 2007, The Wiggles donated their complete back catalogue of 27 master tapes to Australia's National Film and Sound Archive. Their business ventures during these years included opening up "Wiggles World" sections in theme parks in North America and the Arab World, internet offerings, the creation of new television shows, and a five-year-long partnership with the digital cable channel Sprout in 2009. In December 2010, Cinemalive beamed a Wiggles concert live from Acer Arena into movie theatres all over Australia, for children and their families unable to attend their shows.In early July 2011, founding member Fatt developed arrhythmia and underwent "urgent but routine" heart surgery, when he was fitted with a pacemaker after feeling unwell for several weeks and blacking out. He missed the group's US tour as a result, after not missing a show in 20 years. Also in mid-2011, The Wiggles celebrated their 20th anniversary with circus-themed shows and performances throughout Australia and the outback in a circus tent, as well as a "physically grueling" birthday-themed tour of 90 shows throughout Australia, which Paul Field called "one of the biggest of their careers". Sydney's Powerhouse Museum commemorated the group's anniversary with an exhibit that displayed Wiggles memorabilia.In 2011, the worldwide financial crisis hit the group, and they recorded their first drop in revenues in 10 years, at approximately $2.5 million, a total decrease of 28 percent. Royalties partially offset the difference between their 2010 and 2011 revenues. Their managing director Mike Conway called 2011 their toughest year financially. For the first time, they had negative equity, with more liabilities than assets, and the owners had to provide the funds for them to continue operations. Conway stated that their losses were due to less touring time in the US, difficulties in placing their DVDs in Walmart, and their required investment in a new digital platform.
Question: What three circumstances made 2011 the toughest financially for The Wiggles?

Ex Output:
less touring time in the US.