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: Sometime after 4 p.m. on December 6, 1989, Marc Lépine arrived at the building housing the École Polytechnique, an engineering school affiliated with the Université de Montréal, armed with a semi-automatic rifle and a hunting knife. Lépine purchased a rifle on November 21, 1989, in a Checkmate Sports store in Montreal. He had told the clerk that he was going to use it to hunt small game. Lépine had been in and around the École Polytechnique building at least seven times in the weeks leading up to December 6.
Lépine first sat in the office of the registrar on the second floor for a while. While there, he was seen rummaging through a plastic bag. He did not speak to anyone, even when a staff member asked if she could help him. Lépine left the office and was subsequently seen in other parts of the building before entering a second-floor mechanical engineering class of about sixty students at about 5:10 p.m. After approaching the student giving a presentation, he asked everyone to stop everything and ordered the women and men to opposite sides of the classroom. No one moved at first, believing it to be a joke until he fired a shot into the ceiling.Lépine then separated the nine women from the approximately fifty men and ordered the men to leave. He asked the remaining women whether they knew why they were there, and when one student replied "no," he answered: "I am fighting feminism." One of the students, Nathalie Provost, said, "Look, we are just women studying engineering, not necessarily feminists ready to march on the streets to shout we are against men, just students intent on leading a normal life." Lépine responded, "You're women, you're going to be engineers. You're all a bunch of feminists. I hate feminists." He then opened fire on the students from left to right, killing six, and wounding three others, including Provost.  Before leaving the room, he wrote the word shit twice on a student project.Lépine continued into the second-floor corridor and wounded three students before entering another room where he twice attempted to shoot a female student. When his weapon failed to fire, he entered the emergency staircase where he was seen reloading his gun. He returned to the room he had just left, but the students had locked the door; Lépine failed to unlock it with three shots fired into the door. Moving along the corridor, he shot at others, wounding one, before moving towards the financial services office where he shot and killed a woman through the window of the door she had just locked. 
Question: What is the last name of the person who did not speak to anyone when a staff member asked if they could help him?

Output: Lépine.


Input: Consider Input: Passage: A paleontologist named Zack takes his nephew Ricky and niece Jade on a fossil hunt. While alone, Ricky is met by a talking raven, who turns into an Alexornis named Alex. He tells him of a story set in the Cretaceous period 70 million years ago. Patchi is the smallest in a litter of Pachyrhinosaurus hatchlings, and is often bullied by his older brother Scowler. Their father Bulldust is the leader of the Pachyrhinosaurus herd. Alex, who is Patchi's mentor, tries to help Patchi impress a female Pachyrhinosaurus named Juniper, but her herd migrates south without him.
Bulldust moves his herd south as well, but when they try to pass through a forest, they are forced to flee when a storm strikes and a fire erupts. Taking advantage of the chaos, a pack of Gorgosaurus attacks the scattered herd. They kill the rest of Patchi and Scowler's family while their leader Gorgon fights and kills Bulldust. Afterwards, Patchi's herd (now led by Bulldust's rival Major) combines with Juniper's as they continue their migration. There, Gorgon's pack attacks them again. In the ensuing chaos, Patchi, Scowler, and Juniper fall into a river and are swept downstream to the ocean, with Alex following them from above. At a beach, Scowler follows a herd of Edmontosaurus to find food, callously leaving Patchi and Juniper behind. The two make their way through a forest and eventually are able to find their herd and Scowler. 
Question: What are the names of the two Pachyrhinosausus that make their way through the forest to find their heard?

Output: Patchi.


Input: Consider Input: Passage: The rebellion changed the dynamic between settlers and local tribes.  Although the Cherokee repudiated the rebellion, their initial support caused many settlers to distrust the tribe. The rebellion and subsequent Mexican army response also changed the settlers' relationships with other tribes. In preceding years, the Tawakoni and Waco tribes, allied with various Comanche bands, had regularly raided Texas settlements.  Fearing that the tribes, like the Cherokee, could ally with other groups against Mexican control, Bustamante began preparations to attack and weaken all hostile tribes in East Texas. On learning of the imminent invasion, in April 1827 the Towakoni and Waco sued for peace. In June, the two tribes signed a peace treaty with Mexico, promising to halt all raids against Mexican settlers. The Towakoni then assisted their allies, the Penateka Comanche, in reaching a treaty with Mexico. When Bustamante's troops left Texas later that year, the Towakoni and Waco resumed their raiding. The Comanche tribe upheld their treaty for many years and often assisted Mexican soldiers in recovering livestock stolen by the other tribes.The failed rebellion also affected Mexican relations with the United States. Even before the revolt, many Mexican officials had worried that the United States was plotting to gain control of Texas. Once the rebellion came to light, officials suspected that Edwards had been an agent of the United States. To help protect the region, a new, larger, garrison was established in Nacogdoches, to be commanded by Colonel Jose de las Piedras. As a direct result of Edwards's actions, the Mexican government authorized an extensive expedition, conducted by General Manuel de Mier y Terán, to inspect the Texas settlements and to recommend a future course of action. Mier y Teran's reports led to the Law of April 6, 1830, which severely restricted immigration into Texas. Within Texas, the laws were widely denounced by both recent immigrants and native-born Mexicans and led to further armed conflict between Mexican soldiers and Texas residents.Some historians regard the Fredonian Rebellion as the beginning of the Texas Revolution.   Historian W.B. Bates remarked that the revolt was "premature, but it sparked the powder for later success." The people of Nacogdoches played instrumental roles in other rebellions in Texas over the next few years; in 1832, they expelled Piedras and his troops from Nacogdoches, and many Nacogdoches residents participated in the Texas Revolution. 
Question: Who expelled Piedras and his troops from Nacogdoches?


Output: The people of Nacogdoches.