instruction:
In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
question:
Passage: As the 19th century progressed, the United States government's Indian removal policy pushed Native American tribes west of the Mississippi River.  In 1830, the Indian Removal Act was signed into law, and though that act did not directly address the Potawatomi people of Indiana, it led to several additional treaties that resulted in their removal.  In what came to be known as the Potawatomi Trail of Death, about 860 Potawatomi Indians who had refused to leave were forced to move from Indiana to Kansas.  On September 14, 1838, the group camped near Williamsport, and on September 15 they camped in the southwestern part of the county before moving into Illinois.  Before reaching their destination in Kansas, over 40 of them had died, many of them children; two children died and were buried at the second Warren County campsite.When the county was established, the Wabash River was vital to transportation and shipping.  Zachariah Cicott traded up and down the river, and cities like Attica, Perrysville, Baltimore and Williamsport were founded near the river's banks and flourished because of it.  In the 1840s, the Wabash and Erie Canal began to operate and provided even broader shipping opportunities, but the canal favored towns which were on the "right side" of the river; the canal was on the Fountain County side, and towns like Baltimore dwindled as a result.  Some towns, such as Williamsport and Perrysville, managed to participate in canal traffic through the use of side-cuts that brought traffic from the canal across the river.  When railroads were constructed starting in the 1850s, they in turn began to render the canals obsolete and allowed trade to reach towns that lacked water connections.  The canal continued to be used through the early 1870s.
answer:
What decade did the canals that provided broader shipping opportunities start to decline due to railroads?


question:
Passage: In 1865, Burges met John Patrick Crichton-Stuart, 3rd Marquess of Bute. This may have resulted from Alfred Burges's engineering firm, Walker, Burges and Cooper, having undertaken work on the East Bute Docks in Cardiff for the second Marquess. The 3rd Marquess became Burges's greatest architectural patron; both were men of their times; both had fathers whose industrial endeavours provided the means for their sons' architectural achievements, and both sought to "redeem the evils of industrialism by re-living the art of the Middle Ages".On his succession to the Marquessate at the age of one, Bute inherited an income of £300,000 a year, and, by the time he met Burges, he was considered the richest man in Britain, if not the world. Bute's wealth was important to the success of the partnership: as Burges himself wrote, "Good art is far too rare and far too precious ever to be cheap." But, as a scholar, antiquarian, compulsive builder and enthusiastic medievalist, Bute brought more than money to the relationship and his resources and his interests allied with Burges's genius to create what McLees considers to be "Bute's most memorable overall achievement."
However occasioned, the connection lasted the rest of Burges's life and led to his most important works. To the Marquess and his wife, Burges was the "soul-inspiring one". The architectural writer Michael Hall considers Burges's rebuilding of Cardiff Castle and the complete reconstruction of the ruin of Castell Coch, north of the city, as representing his highest achievements. In these buildings, Crook contends that Burges escaped into "a world of architectural fantasy" which Hall describes as "amongst the most magnificent the Gothic Revival ever achieved.".
answer:
What are the specific names of the two buildings in which Cook contends that Burges escaped into "a world of architectural fantasy"?


question:
Passage: The Wiggles are an Australian children's music group formed in Sydney, New South Wales, in 1991. Since 2013, the group members are Anthony Field, Lachlan Gillespie, Simon Pryce, and Emma Watkins.  The original members were Field, Phillip Wilcher, Murray Cook, Greg Page, and Jeff Fatt. Wilcher left the group after their first album. Page retired in 2006 due to ill health and was replaced by understudy Sam Moran, but returned in 2012, replacing Moran. At the end of 2012, Page, Cook, and Fatt retired, and were replaced by Gillespie, Pryce, and Watkins. Cook and Fatt retained their shareholding in the group and all three continued to have input into its creative and production aspects.
Field and Fatt were members of the Australian pop band The Cockroaches in the 1980s, and Cook was a member of several bands before meeting Field and Page at Macquarie University, where they were studying to become pre-school teachers. In 1991, Field was inspired to create an album of children's music based upon concepts of early childhood education, and enlisted Cook, Page, and Fatt to assist him. They began touring to promote the album, and became so successful, they quit their teaching jobs to perform full-time.  The group augmented their act with animal characters Dorothy the Dinosaur, Henry the Octopus, and Wags the Dog, as well as the character Captain Feathersword, played by Paul Paddick since 1993.  They travelled with a small group of dancers, which later grew into a larger troupe. The group's DVDs, CDs, and television programs have been produced independently since their inception.  Their high point came in the early 2000s, after they broke into the American market.
The group was formally consolidated in 2005.  They were listed at the top of Business Review Weekly's top-earning Australian entertainers four years in a row, and earned A$45 million in 2009.  In 2011, the worldwide recession hit The Wiggles, as it had done for many Australian entertainers; they earned $28 million, but they still appeared second on BRW's list that year.  The Wiggles have enjoyed almost universal approval throughout their history, and their music has been played in pre-schools all over the world.  They have earned several Platinum, Double Platinum and Multi-Platinum records, as well as sold 23 million DVDs and 7 million CDs, and have performed, on average, to one million people per year.  The group has also earned multiple Australasian Performing Rights Association (APRA) and Australian Recording Industry Association (ARIA) Music Awards.
answer:

What are the last names of the current members of the Wiggles?