Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Ex Input:
Paragraph- Sent 1: Electric charge is a physical property.
Sent 2: It occurs between particles or objects.
Sent 3: It causes them to attract or repel each other.
Sent 4: They do not even have to touch.
Sent 5: This is unlike the typical push or pull you may be familiar with.
Sent 6: All electric charge is based on the protons and electrons in atoms.
Sent 7: A proton has a positive electric charge.
Sent 8: An electron has a negative electric charge.
Sent 9: Forces on Charged Objects Most atoms are balanced electrically.
Sent 10: They have the same number of positive and negative charges.
Sent 11: Therefore, the number of protons equals the number of electrons.
Sent 12: Neutrons do not matter as they have no charge.
Sent 13: When an object loses some electrons, it becomes positively charged.
Sent 14: There are now more protons than electrons inside the atom.
Sent 15: The lost electrons may remain free.
Sent 16: Or, they may attach to another object.
Sent 17: The new object now has more electrons than protons.
Sent 18: It then becomes negatively charged. 
Question: Why does an object's charge become positive?.

Ex Output:
When an object loses electrons.


Ex Input:
Paragraph- Sent 1: The Vice President stated that he called the President to discuss the rules of engagement for the CAP.
Sent 2: He recalled feeling that it did no good to establish the CAP unless the pilots had instructions on whether they were authorized to shoot if the plane would not divert.
Sent 3: He said the President signed off on that concept.
Sent 4: The President said he remembered such a conversation, and that it reminded him of when he had been an interceptor pilot.
Sent 5: The President emphasized to us that he had authorized the shootdown of hijacked aircraft.
Sent 6: The Vice President's military aide told us he believed the Vice President spoke to the President just after entering the conference room, but he did not hear what they said.
Sent 7: Rice, who entered the room shortly after the Vice President and sat next to him, remembered hearing him inform the President, "Sir, the CAPs are up.
Sent 8: Sir, they're going to want to know what to do."Sent 9: Then she recalled hearing him say, "Yes sir."Sent 10: She believed this conversation occurred a few minutes, perhaps five, after they entered the conference room.
Sent 11: We believe this call would have taken place sometime before 10:10 to 10:15.
Sent 12: Among the sources that reflect other important events of that morning, there is no documentary evidence for this call, but the relevant sources are incomplete.
Sent 13: Others nearby who were taking notes, such as the Vice President's chief of staff, Scooter Libby, who sat next to him, and Mrs. Cheney, did not note a call between the President and Vice President immediately after the Vice President entered the conference room.
Sent 14: At 10:02, the communicators in the shelter began receiving reports from the Secret Service of an inbound aircraft-presumably hijacked-heading toward Washington.
Sent 15: That aircraft was United 93.
Sent 16: The Secret Service was getting this information directly from the FAA.
Sent 17: The FAA may have been tracking the progress of United 93 on a display that showed its projected path to Washington, not its actual radar return.
Sent 18: Thus, the Secret Service was relying on projections and was not aware the plane was already down in Pennsylvania. 
Question: Who signed off giving pilots instructions on whether to shoot down planes if they do not divert?.

Ex Output:
The President.


Ex Input:
Paragraph- Sent 1: For much of the world, the Algarve is synonymous with Portugal, yet the Portuguese will tell you the exact opposite: the region has little in common with the rest of the country.
Sent 2: The southern stretch of coast is more reminiscent of a North African landscape than a European one.
Sent 3: It has no cosmopolitan cities, like Lisbon and Porto, which are farther north.
Sent 4: Most of Portugal is known for quaint towns, medieval castles, and grand palaces.
Sent 5: The Algarve is more recognizable for impenetrable blocks of tourist apartments, hotels, and meticulously manicured golf courses.
Sent 6: And beaches.
Sent 7: Think Algarve and the mind pictures long, glorious stretches of golden sands, secluded coves framed by odd ochre-colored rock formations, and deep green waters.
Sent 8: With about 160 km (100 miles) of coastline, Portugal's southern province is one of Europe's premier beach destinations.
Sent 9: The occasionally chilly ocean is the Atlantic, but the Algarve has a sultry Mediterranean feel.
Sent 10: Its consistent climate is the best in Portugal, and one of the kindest in the world: more than 250 days of sunshine a year — more than almost any other international resort area.
Sent 11: The moderating effect of the Gulf Stream produces a fresh springtime breeze throughout winter, and in late January and February, white almond blossoms blanket the fields.
Sent 12: In summer the heat is intense but rarely unbearable, and regardless, beautiful beaches and innumerable pools are always just a dive away.
Sent 13: Magnificent year-round weather has made the Algarve a huge destination for sporting vacations.
Sent 14: Superb golf facilities abound — several with tees dramatically clinging to cliffs and fairways just skirting the edge of the ocean — and horseback riding, tennis, big-game fishing, sailing, and windsurfing are immensely popular.
Sent 15: Sports, beaches and hospitable weather — not to mention easily organized package vacations — are surely the reasons the Algarve receives as many visitors as the rest of Portugal in its entirety.
Sent 16: But it's not just international tourists that descend on the Algarve; many Portuguese from Lisbon and elsewhere in the north have holiday homes and spend their summer vacations here.
Sent 17: The coast is neatly divided into the rugged Barlavento to the west and the flat beauty of Sotavento to the east.
Sent 18: West is where you'll find the famous orange cliffs and surreal eroded rock stacks. 
Question: Which province of Portugal contains no cosmopolitan cities?.

Ex Output:

The Algarve coastline.


