instruction:
You are given a paragraph, with numbered sentences, and a question. Write the numbers of the sentences needed to answer the given question. Separate multiple sentence numbers with a comma (", "). E.g. "1, 2" would be the correct response if Sent 1 and Sent 2 are needed to answer the given question (do not include sentences that contain no information that is necessary to answer the question). Sort the sentence numbers in an increasing order (i.e., '1, 2', instead of '2, 1'). Your answer should not contain anything than the sentence numbers separated by a comma (e.g. '1, 2, 3, 4'). The given question requires more than one sentence to answer. So, your answer must contain at least one comma (", ").
question:
Paragraph- Sent 1: (CNN) -- Jo-Wilfried Tsonga ended Roger Federer's hopes of winning a record-equaling seventh Wimbledon title on Wednesday as the French 12th seed staged a stunning fightback to reach the semifinals.
Sent 2: Federer appeared to be cruising into the last four after winning the first two sets, but Tsonga inflicted the Swiss world No. 3's first defeat from that vantage point in 179 grand slam matches.
Sent 3: It was only the third time in the 29-year-old's glittering career that the 16-time grand slam champion had surrendered a two-set lead.
Sent 4: Tsonga, ranked 19th in the world, triumphed 3-6 6-7 (3-7) 6-4 6-4 6-4 on Centre Court, serving out to love as he earned a clash with second seed Novak Djokovic.
Sent 5: The Serbian, who beat Tsonga in the 2008 Australian Open final, ended the dream run of Australian 18-year-old Bernard Tomic.
Sent 6: Tsonga defeated Federer for just the second time in six meetings, their first on grass.
Sent 7: "It was amazing.
Sent 8: I played unbelievable.
Sent 9: It's never easy to come back against Roger.
Sent 10: I'm so happy, it's crazy," the 26-year-old told reporters after reaching the semifinals at Wimbledon for the first time.
Sent 11: "He's the biggest champion in the sport.
Sent 12: He has achieved so much and is the best player in the world.
Sent 13: To be two sets down and come back was unbelievable.
Sent 14: I served really well.
Sent 15: Against Djokovic I will have to come out and do the same again."Sent 16: Federer has now lost in the quarterfinals two years in a row, being beaten by eventual runner-up Tomas Berdych in 2010.
Sent 17: "Jo played great.
Sent 18: Really from start to finish I don't remember seeing a break point after I broke him in the first game," Federer said.
Question: The defeat of Federer by Tsonga was the first loss from a two-set lead in how many grand slam matches, and how many times has Roger Federer lost from this same vantage point?.
answer:
2, 3.

question:
Paragraph- Sent 1: Hundreds of thousands of years before China was to become the world's longest-running civilization, the prologue was enacted by means of the flicker of a carefully tended fire.
Sent 2: Peking Man, a forebear of Homo sapiens, achieved a mastery of fire.
Sent 3: We might call it the first Chinese invention.
Sent 4: Not that he devised flint and steel, matches, or any other way of creating fire.
Sent 5: Peking Man simply learned how to capture flame, perhaps from a forest fire, and keep it alight.
Sent 6: He thus enjoyed two revolutionary luxuries: light and heat.
Sent 7: Technologically and sociologically, it was a phenomenal breakthrough: with fire, communities could live year 'round in one cave, in which cooking and even smelting could be pursued.
Sent 8: And so, by 600,000 b.c., about 50 km (31 miles) southwest of present-day Beijing, the ancestors of mankind were ready to settle down.
Sent 9: Several hundred thousand years later, when Marco Polo reached the capital of China, he was astonished by a further development in fire technology.
Sent 10: The Chinese, he announced, used black stones dug out of mountains as fuel.
Sent 11: Europeans did not yet have a word for "coal," nor had they discovered a use for it.
Sent 12: The First Dynasty The confluence of mythology and history in China took place around 4,000 years ago during what is referred to as the Xia (Hsia) Dynasty.
Sent 13: This was still the Stone Age, but the people are thought to have made silk from thread produced by the worms they cultivated on the leaves of their mulberry trees.
Sent 14: And written language (which evolved as early as 4,500 to 5,000 years ago) was already in use, originally by oracles and then by official scribesChina's first scholars.
Sent 15: During the second of the quasi-legendary dynasties, the Shang (from about the 16th to 11th centuries b.c.), the Chinese developed an interest in art.
Sent 16: Careful geometric designs as well as dragon and bird motifs adorned bowls and implements.
Sent 17: And with the arrival of the Bronze Age, the Chinese created bronze vessels of such beauty and originality that, until modern times, archaeologists refused to believe they were cast 3,000 years ago.
Sent 18: The Shang Dynasty gave rise to the concept of one Chinese nation under one government.
Question: Did written language exist during The First Dynasty in China?.
answer:
12, 14.

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: Who gave comments on behalf on the protestors' actions?.
answer:
6, 7.