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.

Q: Passage: The Rosetta Stone is listed as "a stone of black granodiorite, bearing three inscriptions ... found at Rosetta" in a contemporary catalogue of the artefacts discovered by the French expedition and surrendered to British troops in 1801. At some period after its arrival in London, the inscriptions on the stone were coloured in white chalk to make them more legible, and the remaining surface was covered with a layer of carnauba wax designed to protect the Rosetta Stone from visitors' fingers. This gave a dark colour to the stone that led to its mistaken identification as black basalt. These additions were removed when the stone was cleaned in 1999, revealing the original dark grey tint of the rock, the sparkle of its crystalline structure, and a pink vein running across the top left corner. Comparisons with the Klemm collection of Egyptian rock samples showed a close resemblance to rock from a small granodiorite quarry at Gebel Tingar on the west bank of the Nile, west of Elephantine in the region of Aswan; the pink vein is typical of granodiorite from this region.The Rosetta Stone is 1,123 millimetres (3 ft 8 in) high at its highest point, 757 mm (2 ft 5.8 in) wide, and 284 mm (11 in) thick. It weighs approximately 760 kilograms (1,680 lb). It bears three inscriptions: the top register in Ancient Egyptian hieroglyphs, the second in the Egyptian Demotic script, and the third in Ancient Greek. The front surface is polished and the inscriptions lightly incised on it; the sides of the stone are smoothed, but the back is only roughly worked, presumably because this would have not been visible when it was erected.

A: How many kilograms does the Rosetta Stone weigh?
****
Q: Passage: After his mother's death, Vincent, a teenager with Tourette Syndrome, is enrolled in a behavioural facility by his father. While there he rooms with Alex, a Brit with obsessive compulsive disorder, and meets Marie who is in recovery for an eating disorder.
After a child films Vincent with his cellphone and Vincent attacks him, he and Marie are called into Dr. Rose's office where she chastises them and Marie steals her car keys. When Alex discovers Marie and Vincent running away in the middle of the night, he attempts to warn Dr. Rose and is kidnapped by them. The three of them head towards the ocean where Vincent hopes to scatter his mother's ashes. However Vincent does not remember the exact location of the beachside trip he and his mother made years ago. The trio finally settle on Santa Cruz as their destination. 
Dr. Rose informs Vincent's father, Robert, that his son has gone missing and rather than allow the police to apprehend them, she and Robert attempt to track them down. Along the way Marie develops a crush on Vincent.
When they finally reach the ocean Marie collapses before they can reach the water. Marie is hospitalized and while there, the three are reunited with Dr. Rose and Robert. Marie, who is being force fed and has been restrained asks Vincent to run away with her but Vincent refuses. Instead he has a conversation with his father, who apologizes for treating him poorly and decides to stay in Santa Cruz so he can be near Marie. Rather than leave with Dr. Rose, Alex decides to stay with him.

A: What was the name of the person that put Vincent in the behavioural facility?
****
Q: Passage: The American Chemical Society (ACS) has used the Joseph Priestley House as a place to mark special celebrations. On July 31 and August 1, 1874, "seventy-seven chemists made a pilgrimage to the site to celebrate the centennial of chemistry". The date was chosen to mark the hundredth anniversary of Priestley's experiment producing oxygen by heating mercuric oxide with a magnifying lens and sunlight. These chemists came from 15 US states and the District of Columbia, Canada, and England, and their meeting at the house and a local school "is now recognized as the first National Chemistry Congress, and many ACS historians believe it led to ACS's formation two years later on April 6, 1876". On September 5, 1926, about 500 ACS members met again at the home to dedicate the small brick museum and to celebrate the meeting 50 years earlier (two survivors of that first meeting were present).Representatives of the ACS were present at the October 1970 dedication of the house as a museum. On April 25, 1974 around 400 chemists from the ACS Middle Atlantic Regional Meeting in Scranton came to visit the home. The Priestley Medal, the highest and oldest honor awarded by the ACS, was awarded to Paul Flory at the house that day. (A replica of the Priestley Medal is on display at the house.) On August 1, 1974—what has been labeled the bicentennial of the discovery of oxygen—over 500 chemists attending the third Biennial Conference on Chemical Education at State College traveled to the house to celebrate "Oxygen Day". In October 1976, the ACS celebrated its own centennial with a celebration in Northumberland. A 100-plus piece replica of Priestley's laboratory equipment, made by universities, corporations, and the Smithsonian Institution, was presented to the house for display. On April 13, 1983, ACS President Fred Basolo spoke at the house to celebrate Priestley's 250th birthday and as part of a first day of issue ceremony for the United States Postal Service's Joseph Priestley commemorative stamp. In 2001 the ACS again met at the house to celebrate the 125th anniversary of the society, and reenacted parts of the 1874 and 1926 celebrations, including a march to Priestley's grave, at which each participant left a red rose.

A:
Where did 500 ACS members met again on September 5 1926?
****