instruction:
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.
question:
Paragraph- Sent 1: Little is known of the earliest Stone Age inhabitants of Europe's southwestern extremity.
Sent 2: The ancient Greeks called them the Cynetes (or Cunetes).
Sent 3: Whatever their origins, their culture evolved under the pressure and influence of foreign forces.
Sent 4: Among the many invading armies that settled here and contributed to nascent Portuguese culture were Phoenicians, who settled in the area around 1,000 b.c., followed by the Celts, Iberians, Greeks, and Carthaginians.
Sent 5: But it was the Romans, who arrived late in the third century b.c., who most greatly influenced all of Iberia.
Sent 6: They built towns, industries, roads, and bridges, developed agriculture, and bequeathed the Latin language, of which Portuguese is a direct descendant.
Sent 7: The Romans named the southwestern province of the peninsula Lusitania, oddly enough for one of the Celtiberian tribes they defeated, and by the third century a.d.
Sent 8: had introduced Christianity.
Sent 9: By the beginning of the fourth century the Algarve had a bishop in place, based in Faro.
Sent 10: But Rome had already fallen into decay, and soon hordes of northern tribesmen took over the empire.
Sent 11: The Algarve fell to the Visigoths in the mid-fifth century.
Sent 12: Under Moorish Rule In a.d.
Sent 13: 711, the Moors brought powerful armies from North Africa and launched a devastating attack on the Iberian peninsula, conquering much of what would become Spain and Portugal.
Sent 14: They imposed Islam and left an indelible influence on the countryside and the population of the Algarve.
Sent 15: The Moorish legacy can still be seen in the form of wells and waterwheels, squat white houses, the dark complexions of the people, and in the very name given the regiontaken from Al-Gharb, which means "country of the west" (when the Moors conquered the territory, it was the most westerly in the known world).
Sent 16: The Moors governed their Iberian kingdoms from across the border in Seville, but the Algarve had its own regional capital and huge, invulnerable fortress.
Sent 17: The capital was Chelb (or Xelb), and it was bigger and better defended than Lisbon.
Sent 18: Today the town, known as Silves, is a provincial outpost whose only besiegers are busloads of tourists who climb the narrow streets up to the old Moorish ramparts.
Question: Who arrived after the Celts and Iberians?.
answer:
Islam.

question:
Paragraph- Sent 1: Paris, France (CNN) -- Hundreds of French workers, angry about proposed layoffs at a Caterpillar factory, were holding executives of the company hostage Tuesday, a spokesman for the workers said.
Sent 2: Caterpillar's French staff say they are angry about a lack of negotiations over layoffs.
Sent 3: It is at least the third time this month that French workers threatened with cutbacks have blockaded managers in their offices to demand negotiations.
Sent 4: Executives were released unharmed in both previous situations.
Sent 5: The latest incident started Tuesday morning at the office of the construction equipment company in the southeastern city of Grenoble.
Sent 6: The workers were angry that Caterpillar had proposed cutting more than 700 jobs and would not negotiate, said Nicolas Benoit, a spokesman for the workers' union.
Sent 7: They did not want to harm the Caterpillar executives, Benoit told CNN.
Sent 8: One hostage was released Tuesday evening leaving workers with four captives inside the Caterpillar building.
Sent 9: The released man was a human resources director identified only as Mr. Petit, because he has heart problems, union representative Bernard Patrick told CNN.
Sent 10: Petit had a heart attack a few weeks ago, Patrick said.
Sent 11: The four others still being held are Nicolas Polutnik, the head of operations; two other executives; and Petit's personal assistant, he said.
Sent 12: About 500 employees were also outside the building protesting.
Question: When was Mr. Petit released?.
answer:
Tuesday evening.

question:
Paragraph- Sent 1: Elaan is a declaration of war against the reign of terror unleashed by the ganglords .
Sent 2: The story revolves around an upright and principled Police Officer , A.C.P. Ramakant Chaudhary whose eldest son Vikas is killed in a pre-planned accident .
Sent 3: But the A.C.P. is unable to nab the culprits for want of valid evidence .
Sent 4: Consequently , the A.C.P. , his wife Revati and younger son Vishal are griefstricken over the loss of young Vikas .
Sent 5: While the atmosphere in the city is already vitiated by the atrocities of ganglords Baba Khan and Manna Shetty who enjoy the support of some unscrupulous police personnel , the A.C.P. vows to make the ruthless gangsters bite the dust , without taking the law in his own hands .
Sent 6: On the other hand , Vishal an angry young man , can not stand this injustice since the police had failed to arrest his brother's killers , and he silently resents his A.C.P father's inaction in dealing with the culprits .
Sent 7: The ideologies of the father and son clash - Which lead to a conflict between a dutiful father and a reckless son .
Sent 8: The only one who understands the agony of Vishal is Mohini , the daughter of head constable Devkinandan Sharma .
Sent 9: The day comes when Vishal confronts Baba Khan and Manna Shetty Which leads to tension and gory situation for the A.C.P. , as the ganglords threaten to eliminate the A.C.P. as well as his wife Revati and son Vishal .
Question: What was the name of the police officer whose son was murdered and why was he unable to arrest the culprits?.
answer:
A.C.P. Ramakant Chaudhary, he had no valid evidence.