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.

Input: Consider Input: Passage: At the court in Ferrara, a collection of ladies skilled in music inspired the composer Luzzasco Luzzaschi and caught the Duke's interest. This group, which led to the formation of the concerto delle donne, performed within the context of the Duke's musica secreta, a regular series of chamber music concerts performed for an exclusive audience. This preliminary group was originally made up of talented but amateur members of the court: the sisters Lucrezia and Isabella Bendidio, Leonora Sanvitale, and Vittoria Bentivoglio. They were joined by bass Giulio Cesare Brancaccio, who was specifically brought to the court in 1577 for his singing ability. The preliminary ensemble was active throughout the 1570s, and its membership solidified in 1577. Only later did professionals replace these original singers.
The Duke did not announce the creation of a professional, all-female ensemble; instead, the group infiltrated and gradually dominated the musica secreta, so that after the dismissal of Brancaccio for insubordination in 1583, no more male members of the musica secreta were hired. Even when Brancaccio was performing with the consort it was referred to as a ladies' ensemble, because women singing together was the most exciting aspect of the group. This new ensemble, the concerto delle donne, was created by Alfonso in part to amuse his young new wife, Margherita Gonzaga d'Este (she was only fourteen when they wed in 1579), and in part to help the Duke achieve his artistic goals for the court. According to Grana, a contemporary correspondent, "Signora Machiavella [Lucrezia], Signora Isabella, and Signora Vittoria have abandoned the field, having lost the backing of Luzzaschi". The first recorded performance by the professional ladies was on November 20, 1580; by carnival season in 1581, they were performing together regularly.This new "consort of ladies" was viewed as an extraordinary and novel phenomenon; most witnesses did not connect the second period of the concerto delle donne with the group of ladies who sang in the musica secreta. Today, however, the earlier group is viewed as a crucial part of the creation and development of the social and vocal genre of the concerto delle donne. 
Question: What were the first names of the two sisters in the original preliminary group?

Output: Lucrezia.


Input: Consider Input: Passage: Jimmy and Fletch are two friends living in London, experiencing life problems. Jimmy is dumped by his unscrupulous girlfriend, and Fletch is fired from his job as a clown for punching a child. They decide to escape their woes and hike to a remote village in Norfolk that they find on an old map. As they arrive at a pub in the village, with Jimmy upset about Fletch destroying his phone, they see a number of attractive foreign female history students leaving.
Hoping to find more beautiful women inside, they are greeted by a morose crowd of men and approached by a seemingly crazed vicar who believes Jimmy is a long lost descendant of a local vampire slayer. As the barman offers the two men free ale as an apology for the vicar, they learn the students they saw earlier are going to a cottage, where they are to stay the night. Jimmy and Fletch pursue the students' van, catching up to it as the engine has broken down, and are introduced to four girls (Heidi, Lotte, Anke and Trudi). They are invited to join a party on the bus.
The group arrives at their destination, only to learn that a curse rests over the village and that every female child turns into a lesbian vampire on her 18th birthday. There is an old legend stating that the Vampire Queen, Carmilla, descended on the village during the night of a blood moon, killed its menfolk and seduced its women to her evil. When the ruler of the land, Baron Wolfgang Mclaren (Jimmy's great ancestor) returned from the Crusades, he discovered one of the women corrupted by Carmilla was his wife, Eva. The baron forged a sacred sword, then defeated Carmilla, but before dying, Carmilla cursed the village, adding that when the blood of the last of Mclaren's bloodline mixed with a virgin girl's blood, Carmilla would be resurrected. 
Question: Who did the man that the barman apologized for think Fletch's friend was?

Output: a long lost descendant of a local vampire slayer.


Input: Consider Input: Passage: The Willamette River ( (listen) wil-AM-it) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is 187 miles (301 km) long, lying entirely in northwestern Oregon in the United States. Flowing northward between the Oregon Coast Range and the Cascade Range, the river and its tributaries form the Willamette Valley, a basin that contains two-thirds of Oregon's population, including the state capital, Salem, and the state's largest city, Portland, which surrounds the Willamette's mouth at the Columbia.
Originally created by plate tectonics about 35 million years ago and subsequently altered by volcanism and erosion, the river's drainage basin was significantly modified by the Missoula Floods at the end of the most recent ice age. Humans began living in the watershed over 10,000 years ago. There were once many tribal villages along the lower river and in the area around its mouth on the Columbia. Indigenous peoples lived throughout the upper reaches of the basin as well.
Rich with sediments deposited by flooding and fed by prolific rainfall on the western side of the Cascades, the Willamette Valley is one of the most fertile agricultural regions in North America, and was thus the destination of many 19th-century pioneers traveling west along the Oregon Trail. The river was an important transportation route in the 19th century, although Willamette Falls, just upstream from Portland, was a major barrier to boat traffic. In the 21st century, major highways follow the river, and roads cross it on more than 50 bridges.
Since 1900, more than 15 large dams and many smaller ones have been built in the Willamette's drainage basin, 13 of which are operated by the U.S. Army Corps of Engineers (USACE). The dams are used primarily to produce hydroelectricity, to maintain reservoirs for recreation, and to prevent flooding. The river and its tributaries support 60 fish species, including many species of salmon and trout; this is despite the dams, other alterations, and pollution (especially on the river's lower reaches). Part of the Willamette Floodplain was established as a National Natural Landmark in 1987 and the river was named as one of 14 American Heritage Rivers in 1998. 
Question: What organization operates 13 of the dams built in the river that is a major tributary of the Columbia river?


Output: U.S. Army Corps of Engineers.