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.

Input: Consider Input: Passage: The chief building material of the church is buff sandstone, which came from the Goodrich Quarry (also called the Greystone Quarry) in the Almaden area of San Jose, was delivered by train and rough-cut in the university Quad.  Gregg credits the high quality of the stonework to church and university builder John D. McGilvray.  The church is roofed with terracotta tiles of the Italian imbrex and tegula form. The nave, chancel, and transepts appear to project from the square central structure, roofed with tiles and a small skylight above its center.  Memorial Church originally had a central bell tower with an 80-foot tall, twelve-sided spire, but this was lost as a result of the 1906 earthquake.The church's facade is surmounted by a simple Celtic cross, a motif that appears several times throughout the building.  The cross was added after the 1906 earthquake; its central shaft was destroyed in the Loma Prieta earthquake and replaced.  There are three arched entrances below the exterior mosaic; the central one is slightly larger than the others.  The surrounding stonework is intricately carved with stylized flora, twisted-cable moldings, and bosses of sculpted cherubim, a motif which occurs in different media throughout the church. In the spandrels are mosaic depictions of the biblical concepts of love, faith, hope and charity intertwined in a vine representing the "tree of life".In the upper zone of the facade, surrounded by more elaborate stonework and "lacy carving", is a large central window, with groups of three smaller windows on each side.  The original central window was a quatrefoil-shaped rose window, but after the 1906 earthquake, it was replaced by a "classical round-head window that more grandly restates the smaller flanking, articulated openings" and that corresponded with the mission-style architecture of the Quad.  Beneath the windows are inlaid panels of colored marble.

Output: What church's chief building material was buff sandstone?


Input: Consider Input: Passage: Hillsboro () is the fifth-largest city in the State of Oregon and is the county seat of Washington County. Lying in the Tualatin Valley on the west side of the Portland metropolitan area, the city hosts many high-technology companies, such as Intel, that comprise what has become known as the Silicon Forest. At the 2010 Census, the city's population was 91,611.For thousands of years before the arrival of European-American settlers, the Atfalati tribe of the Kalapuya lived in the Tualatin Valley near the later site of Hillsboro. The climate, moderated by the Pacific Ocean, helped make the region suitable for fishing, hunting, food gathering, and agriculture. Settlers founded a community here in 1842, later named after David Hill, an Oregon politician. Transportation by riverboat on the Tualatin River was part of Hillsboro's settler economy. A railroad reached the area in the early 1870s and an interurban electric railway about four decades later. These railways, as well as highways, aided the slow growth of the city to about 2,000 people by 1910 and about 5,000 by 1950, before the arrival of high-tech companies in the 1980s.
Hillsboro has a council–manager government consisting of a city manager and a city council headed by a mayor. In addition to high-tech industry, sectors important to Hillsboro's economy are health care, retail sales, and agriculture, including grapes and wineries. The city operates more than twenty parks and the mixed-use Hillsboro Stadium, and ten sites in the city are listed on the National Register of Historic Places (NRHP). Modes of transportation include private vehicles, public buses and light rail, and aircraft using the Hillsboro Airport. The city is home to Pacific University's Health Professions Campus. Notable residents include two Oregon governors.

Output: What is on the east side of Hillsboro?


Input: Consider Input: Passage: Sixteen days after his death, Wallace's double-disc second album was released as planned with the shortened title of Life After Death and hit No. 1 on the Billboard 200 charts, after making a premature appearance at No. 176 due to street-date violations. The record album featured a much wider range of guests and producers than its predecessor. It gained strong reviews and in 2000 was certified Diamond, the highest RIAA certification awarded to a solo hip hop album.
Its lead single, "Hypnotize", was the last music video recording in which Wallace would participate. His biggest chart success was with its follow-up "Mo Money Mo Problems", featuring Sean Combs (under the rap alias "Puff Daddy") and Mase. Both singles reached No. 1 in the Hot 100, making Wallace the first artist to achieve this feat posthumously. The third single, "Sky's The Limit", featuring the band 112, was noted for its use of children in the music video, directed by Spike Jonze, who were used to portray Wallace and his contemporaries, including Combs, Lil' Kim, and Busta Rhymes. Wallace was named Artist of the Year and "Hypnotize" Single of the Year by Spin magazine in December 1997.In mid-1997, Combs released his debut album, No Way Out, which featured Wallace on five songs, notably on the third single "Victory". The most prominent single from the record album was "I'll Be Missing You", featuring Combs, Faith Evans and 112, which was dedicated to Wallace's memory. At the 1998 Grammy Awards, Life After Death and its first two singles received nominations in the rap category. The album award was won by Combs's No Way Out and "I'll Be Missing You" won the award in the category of Best Rap Performance By A Duo Or Group in which "Mo Money Mo Problems" was nominated.In 1996, Wallace started putting together a hip hop supergroup, the Commission, which consisted himself, Jay-Z, Lil' Cease, Combs, and Charli Baltimore. The Commission was mentioned by Wallace in the lyrics of "What's Beef" on Life After Death and "Victory" from No Way Out, but a Commission album was never completed. A track on Duets: The Final Chapter, "Whatchu Want (The Commission)", featuring Jay-Z, was based on the group.


Output: What is the name of the supergroup that never completed an album?