QUES: Tucson was probably first visited by Paleo-Indians, known to have been in southern Arizona about 12,000 years ago. Recent archaeological excavations near the Santa Cruz River have located a village site dating from 2100 BC.[citation needed] The floodplain of the Santa Cruz River was extensively farmed during the Early Agricultural period, circa 1200 BC to AD 150. These people constructed irrigation canals and grew corn, beans, and other crops while gathering wild plants and hunting. The Early Ceramic period occupation of Tucson saw the first extensive use of pottery vessels for cooking and storage. The groups designated as the Hohokam lived in the area from AD 600 to 1450 and are known for their vast irrigation canal systems and their red-on-brown pottery.[citation needed]

How long ago did Tuscan have their first visitors?
What is the answer?
ANS: 12,000 years ago
QUES: Letters of support from the pope arrived in April but by then the rebel barons had organised. They congregated at Northampton in May and renounced their feudal ties to John, appointing Robert fitz Walter as their military leader. This self-proclaimed "Army of God" marched on London, taking the capital as well as Lincoln and Exeter. John's efforts to appear moderate and conciliatory had been largely successful, but once the rebels held London they attracted a fresh wave of defectors from John's royalist faction. John instructed Langton to organise peace talks with the rebel barons.

Who was the rebel baron leader?
What is the answer?
ANS: Robert fitz Walter
QUES: Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century. Italy was the major user, for lines in the mountainous regions of northern Italy from 1901 until 1976. The first lines were the Burgdorf-Thun line in Switzerland (1899), and the lines of the Ferrovia Alta Valtellina from Colico to Chiavenna and Tirano in Italy, which were electrified in 1901 and 1902. Other lines where the three-phase system were used were the Simplon Tunnel in Switzerland from 1906 to 1930, and the Cascade Tunnel of the Great Northern Railway in the United States from 1909 to 1927.

The four-phase system was used in what tunnel in Switzerland?
What is the answer?
ANS:
unanswerable