IN: Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means ''change in form''. The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock.
can a metamorphic rock become another metamorphic rock?

OUT: yes

IN: The Kentucky Derby was first run at 1 1/2 miles (12 furlongs; 2.4 km) the same distance as the Epsom Derby. The distance was changed in 1896 to its current 1 1/4 miles (10 furlongs; 2 km). On May 17, 1875, in front of an estimated crowd of 10,000 people, a field of 15 three-year-old horses contested the first Derby. Under jockey Oliver Lewis, a colt named Aristides, who was trained by future Hall of Famer Ansel Williamson, won the inaugural Derby. Later that year, Lewis rode Aristides to a second-place finish in the Belmont Stakes.
are there always 20 horses in kentucky derby?

OUT: no

IN: The conflict occurred in Logan County, West Virginia, as part of the Coal Wars, a series of early-20th-century labor disputes in Appalachia. Tensions rose between workers and mine management, and for five days from late August to early September 1921, some 10,000 armed coal miners confronted 3,000 lawmen and strikebreakers, called the Logan Defenders, who were backed by coal mine operators during the miners' attempt to unionize the southwestern West Virginia coalfields. The battle ended after approximately one million rounds were fired and the United States Army intervened by presidential order. Up to 100 people were killed, and many more arrested. The United Mine Workers saw major declines in membership, but the long-term publicity led to some improvements in working conditions.
were the army used in the miners strike?

OUT: yes

IN: A yardstick is a straightedge used to physically measure lengths of up to one yard (3.0 feet or 0.9144 meters long) high. Yardsticks are flat boards with markings at regular intervals. In the metric system, a similar device measuring up to one meter is called a meter-stick.
is a yardstick and a meter stick the same?

OUT:
no