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 (", ").

Paragraph- Sent 1: Into the 21st Century: As 1997 drew nearer, it became clear that the Chinese government had no intention of renewing the 99-year lease on the New Territories.
Sent 2: Negotiations began, and in 1984 Prime Minister Margaret Thatcher signed the Sino-British Joint Declaration, in which Britain confirmed the transfer of the New Territories and all of Hong Kong to China in 1997.
Sent 3: For its part, China declared Hong Kong a "Special Administrative Region" and guaranteed its civil and social system for at least 50 years after 1997.
Sent 4: Although China's Basic Law promised that Hong Kong's existing laws and civil liberties would be upheld, refugees began flowing the other way.
Sent 5: The British Nationality Act (1981) had in effect prevented Hong Kong citizens from acquiring British citizenship, and thousands of people, anxious about their future under China's rule, were prompted to apply for citizenship elsewhere, notably in Canada and Australia.
Sent 6: The protests in 1989 in Beijing's Tiananmen Square sparked sympathy marches in Hong Kong, and further increased tension with China.
Sent 7: Some companies moved their headquarters out of Hong Kong.
Sent 8: Ironically, as the handover approached, the British granted the Hong Kong Chinese more political autonomy than they had done since the colony was founded, including such democratic reforms as elections to the Legislative Council.
Sent 9: Since the handover in July 1997, China has generally followed a hands-off policy.
Sent 10: Many who fled have returned.
Sent 11: What controls heartbeats in Hong Kong are the fluctuations of the Hang Seng Index, foreign currency exchange rates, and skyrocketing property prices.
Sent 12: In short, the status quo prevails.
Sent 13: Everybody hopes Hong Kong will remain stable, but everyone also has their doubts.
Sent 14: In the meantime, the philosophy is to seize present-day opportunities in the thriving economy.
Question: what two countries were involved in the Sino-British Joint Declaration in 1997?.
1, 2.

Paragraph- Sent 1: On to the Twentieth Century: The British extended their control over the peninsula by putting together the whole panoply of colonial administrationcivil service, public works, judiciary force, police force, post office, education, and land regulationwith teams of British administrators, teachers, engineers, and doctors to go with it.
Sent 2: At the same time, the tin industry, dominated by Chinese using labor-intensive methods in the 19th century, passed increasingly into Western hands, who employed the modern technology of gravel pumps and mining dredges.
Sent 3: Petroleum had been found in northern Borneo, at Miri, and in Brunei, and the Anglo-Dutch Shell company used Singapore as its regional depot for its oil supplies and exports.
Sent 4: But the major breakthrough for the Malay economy was the triumph of rubber, when Singapore's new garden director, Henry Ridle ("Rubber Ridley" to his friends, "Mad Ridley" to all doubting Thomases) had developed new planting and tapping methods and painstakingly spread his faith in rubber around the peninsula.
Sent 5: World demand increased with the growth of the motor-car and electrical industries, and sky-rocketed during World War I. By 1920, Malaya was producing 53 percent of the world's rubber, which had overtaken tin as its main source of income.
Sent 6: The Malay ruling class again took a back seat.
Sent 7: Together with effective control of the rubber and tin industries, the British now firmly held the reins of government.
Sent 8: The sultans were left in charge of local and religious affairs, content with their prestige, prosperity, and security.
Sent 9: The census of 1931 served as an alarm signal for the Malay national consciousness.
Sent 10: Bolstered by a new influx of immigrants to meet the rubber and tin booms of the 1920s, non-Malays now slightly outnumbered the indigenous population.
Sent 11: The Great Depression of 1929 stepped up ethnic competition in the shrinking job market, and nationalism developed to safeguard Malay interests against the Chinese and Indians rather than the British imperial authority.
Sent 12: Though hampered by the peninsula's division into the States and the Straits Settlements, relatively conservative Muslim intellectuals and community leaders came together at the Pan-Malayan Malay Congress in Kuala Lumpur in 1939.
Sent 13: In Singapore the following year, they were joined by representatives from Sarawak and Brunei.
Sent 14: Teachers and journalists urged the revival of the common Malay-Indonesian consciousness, split by the Anglo-Dutch dismemberment of the region in the 19th century.
Sent 15: This spirit became a factor in the gathering clouds of war.
Question: What caused the Malay ruling class to take a back seat?.
5, 6.

Paragraph- Sent 1: Princess Ellen wanted nothing more than to be a singer when she grew up.
Sent 2: She had a beautiful voice and everyone who heard it said she was the best singer in the land.
Sent 3: But her uncle believed singing would keep her from her job as princess, so he found a witch and paid her to steal Princess Ellen's voice.
Sent 4: The witch made a spell which gave Ellen the witch's voice.
Sent 5: The spell also gave Ellen's voice to the witch.
Sent 6: The witch went on to become famous as a singer, and Ellen grew up to be Queen.
Sent 7: One day Queen Ellen heard of a singer who was the best in the land.
Sent 8: She went to hear this singer, and was surprised to hear her own voice coming from the woman on stage.
Sent 9: When the show was over, Ellen found the singer and gave her a penny.
Sent 10: Ellen told the singer, "You have a magical voice".
Sent 11: The witch was so touched by Ellen's kindness, that she gave Ellen her voice back.
Question: who was surprised to hear her own voice coming from the woman on stage.
7, 8.