Question: Who was the first European to reach the country where the birthplace of Shi Na is located?

full_context: Document 1: Han dynasty: The Xiongnu, a nomadic steppe confederation, defeated the Han in 200 BC and forced the Han to submit as a de facto inferior partner, but continued their raids on the Han borders. Emperor Wu of Han (r. 141–87 BC) launched several military campaigns against them. The ultimate Han victory in these wars eventually forced the Xiongnu to accept vassal status as Han tributaries. These campaigns expanded Han sovereignty into the Tarim Basin of Central Asia, divided the Xiongnu into two separate confederations, and helped establish the vast trade network known as the Silk Road, which reached as far as the Mediterranean world. The territories north of Han's borders were quickly overrun by the nomadic Xianbei confederation. Emperor Wu also launched successful military expeditions in the south, annexing Nanyue in 111 BC and Dian in 109 BC, and in the Korean Peninsula where the Xuantu and Lelang Commanderies were established in 108 BC.
Document 2: Wang Jing (athlete): Wang represented China at the 2008 Summer Olympics in Beijing competing at the 100 metres sprint. In her first round heat she placed fifth in a time of 11.87 which was not enough to advance to the second round. Together with Tao Yujia, Jiang Lan and Qin Wangping she also took part in the 4x100 metres relay. In their first round heat they placed fourth behind Jamaica, Russia and Germany. Their time of 43.78 seconds was the tenth time overall out of sixteen participating nations. With this result they failed to qualify for the final.
Document 3: Yuan dynasty: The first recorded travels by Europeans to China and back date from this time. The most famous traveler of the period was the Venetian Marco Polo, whose account of his trip to "Cambaluc," the capital of the Great Khan, and of life there astounded the people of Europe. The account of his travels, Il milione (or, The Million, known in English as the Travels of Marco Polo), appeared about the year 1299. Some argue over the accuracy of Marco Polo's accounts due to the lack of mentioning the Great Wall of China, tea houses, which would have been a prominent sight since Europeans had yet to adopt a tea culture, as well the practice of foot binding by the women in capital of the Great Khan. Some suggest that Marco Polo acquired much of his knowledge through contact with Persian traders since many of the places he named were in Persian.
Document 4: Sin Na-hee: Sin Na-hee (born September 24, 1990 in Daegu) is a South Korean figure skater. She represented her country at the 2008 World Junior Championships and finished 17th. She won the bronze medal at the 2008 Asian Figure Skating Trophy.
Document 5: 2017 South Asian floods: Monsoon rains caused urban flooding in Karachi and Rawalpindi, the largest city in Pakistan. At least 23 people, including seven children, died after Karachi received up to 130 millimetres (5.1 in) of rainfall on 31 August. Most of the victims died from being electrocuted, with others being killed by partial building collapses or drowning. Two more died in Kashmore and Jamshoro districts of Sindh.The flooding followed a little more than a week after 41 millimetres (1.6 in) of rain fell on Karachi on 21–22 August. There, 19 people died in rain-related incidents—including electrocution, falling billboards, and roof collapse, according to the Edhi and Chhipa rescue services.
Document 6: Somalia at the 2008 Summer Olympics: Somalia sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. The country's participation at Beijing marked its seventh in the Summer Olympics since its debut in 1972 Games. The delegation included two track and field athletes: sprinter Samiya Yuusf Omar and long-distance runner Abdinasir Said Ibrahim. Neither athlete progressed past the first round of their respective competitions. Omar's story, having trained in Mogadishu during the Somali Civil War, was covered by the media at the time, and later featured in a graphic novel following her death.
Document 7: 2008 Sichuan earthquake: The most precarious of these quake-lakes was the one located in the extremely difficult terrain at Mount Tangjia in Beichuan County, Sichuan, accessible only by foot or air; an Mi-26T heavy lift helicopter belonging to the China Flying Dragon Special Aviation Company was used to bring heavy earthmoving tractors to the affected location. This operation was coupled with the work done by PLAAF Mi-17 helicopters bringing in PLA engineering corps, explosive specialists and other personnel to join 1,200 soldiers who arrived on site by foot. Five tons of fuel to operate the machinery was airlifted to the site, where a sluice was constructed to allow the safe discharge of the bottlenecked water. Downstream, more than 200,000 people were evacuated from Mianyang by June 1 in anticipation of the dam bursting.
Document 8: Chronology of European exploration of Asia: A Roman diplomat or merchant lands in northern Vietnam and visits Nanjing, China and the court of Sun Quan, ruler of Eastern Wu
Document 9: 2009 Chongqing mine blast: The 2009 Chongqing mine blast was a gas explosion that occurred at a coal mine in southwestern China in Qijiang County, Chongqing, China.
Document 10: Nanjing: As the center of the empire, early-Ming Nanjing had worldwide connections. It was home of the admiral Zheng He, who went to sail the Pacific and Indian Oceans, and it was visited by foreign dignitaries, such as a king from Borneo (Boni 渤泥), who died during his visit to China in 1408. The Tomb of the King of Boni, with a spirit way and a tortoise stele, was discovered in Yuhuatai District (south of the walled city) in 1958, and has been restored.
Document 11: Lin Sang: Lin represented China at the 2004 Summer Olympics. She placed 11th in the women's individual ranking round with a 72-arrow score of 647. In the first round of elimination, she faced 54th-ranked Tshering Chhoden of Bhutan. In a major upset, Lin lost 159-156 in the 18-arrow match, placing only 36th overall in women's individual archery.
Document 12: Shi Na: Shi Na (born February 17, 1981 in Xintai, Shandong) is a Chinese athletics race walker. She represented her country at the 20 km race walk event at the 2008 Summer Olympics.
Document 13: 2007 Shandong coal mine flood: The 2007 Shandong coal mine flood was an incident that occurred on August 17, 2007 in Xintai, Shandong, People's Republic of China, when heavy rain caused a river to burst a levee creating a flood into two mine shafts. By 8:50 am (1:50GMT), the mine was inundated underwater.
Document 14: 2017 Sierra Leone mudslides: Early in the morning on August 14, 2017, after three days of torrential rainfall, devastating floods and mudslides occurred in and around Sierra Leone's capital city, Freetown.
Document 15: Han dynasty: Even before Han's expansion into Central Asia, diplomat Zhang Qian's travels from 139 to 125 BC had established Chinese contacts with many surrounding civilizations. Zhang encountered Dayuan (Fergana), Kangju (Sogdiana), and Daxia (Bactria, formerly the Greco-Bactrian Kingdom); he also gathered information on Shendu (Indus River valley of North India) and Anxi (the Parthian Empire). All of these countries eventually received Han embassies. These connections marked the beginning of the Silk Road trade network that extended to the Roman Empire, bringing Han items like silk to Rome and Roman goods such as glasswares to China.
ground_truth: A Roman diplomat or merchant
sub_queries: Shi Na >> place of birth Answer: Xintai
Xintai >> country Answer: China
who was the first european to reach China Answer: A Roman diplomat or merchant