Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the early 19th century, the Indigenous American woman Sacagawea, who would help translate for and guide the Lewis and Clark Expedition in the West, married the French trapper Toussaint Charbonneau. Most marriages between Europeans and Indigenous Americans were between European men and Indigenous American women. Depending on the kinship system of the woman's tribe, their children would be more or less easily assimilated into the tribe. Nations that had matrilineal systems, such as the Creek and Cherokee in the Southeast, gave the mixed-race children status in their mother's clans and tribes. If the tribe had a patrilineal system, like the Omaha, the children of white fathers were considered white. Unless they were specifically adopted into the tribe by an adult male, they could have no social status in it.
What did not dictate how easily a woman's children would be assimilated into a tribe?
A: unanswerable

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Following the 1973 war and the subsequent peace treaty, Egypt became the first Arab nation to establish diplomatic relations with Israel. Despite that, Israel is still widely considered as a hostile state by the majority of Egyptians. Egypt has played a historical role as a mediator in resolving various disputes in the Middle East, most notably its handling of the Israeli-Palestinian conflict and the peace process. Egypt's ceasefire and truce brokering efforts in Gaza have hardly been challenged following Israel's evacuation of its settlements from the strip in 2005, despite increasing animosity towards the Hamas government in Gaza following the ouster of Mohamed Morsi, and despite recent attempts by countries like Turkey and Qatar to take over this role.
What rope has Egypt played in Middle East peace efforts?
A: mediator

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There are a number of aids available to pilots, though not all airports are equipped with them. A visual approach slope indicator (VASI) helps pilots fly the approach for landing. Some airports are equipped with a VHF omnidirectional range (VOR) to help pilots find the direction to the airport. VORs are often accompanied by a distance measuring equipment (DME) to determine the distance to the VOR. VORs are also located off airports, where they serve to provide airways for aircraft to navigate upon. In poor weather, pilots will use an instrument landing system (ILS) to find the runway and fly the correct approach, even if they cannot see the ground. The number of instrument approaches based on the use of the Global Positioning System (GPS) is rapidly increasing and may eventually be the primary means for instrument landings.
What instruments do pilots use to find the runway and fly the correct approach, even if they cannot see the ground?
A: instrument landing system

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Oklahoma is host to a diverse range of sectors including aviation, energy, transportation equipment, food processing, electronics, and telecommunications. Oklahoma is an important producer of natural gas, aircraft, and food. The state ranks third in the nation for production of natural gas, is the 27th-most agriculturally productive state, and also ranks 5th in production of wheat. Four Fortune 500 companies and six Fortune 1000 companies are headquartered in Oklahoma, and it has been rated one of the most business-friendly states in the nation, with the 7th-lowest tax burden in 2007.
How many Fortune 1000 companies are based in Oklahoma?
A:
six