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 (", ").

[EX Q]: Paragraph- Sent 1: Miguel and his mother suffer a car accident ; Miguel s mother dies , but the boy miraculously survives without any injuries .
Sent 2: Given that his father died before he was born , he goes on to live with his grandmother in Sintra .
Sent 3: There he is reunited with Carlos , his best childhood friend .
Sent 4: Miguel asks for a transfer to the local university in Sintra and pursues a degree in History .
Sent 5: On the first day of lectures , before entering the Medieval History classroom , Miguel watches someone approach .
Sent 6: A girl walks in his direction , and as she enters their eyes immediately meet .
Sent 7: Her name is Sofia .
Sent 8: Miguel and Sofia immediately feel an explosive and overwhelming attraction .
Sent 9: The presence of Sofia will also awaken unknown abilities in Miguel , both physically and mentally .
Sent 10: Though Miguel and Sofia do not know it , their destinies are connected .
Sent 11: Sofia is a vampire that belongs to the family of Hector , L dia , and the provocative Valentina .
Sent 12: Sofia is not a mere vampire ; she is the next step in vampiric evolution , because she is immune to sunlight .
Sent 13: Therefore she is protected by Hector and L dia , envied by Valentina and coveted by Hector 's creator , the deadly Victor .
Sent 14: Like Sofia , Miguel is not a mere human .
Sent 15: The first episode suggests that he may be the son of the vampire Charles , which makes him a dhampir and , consequently , gives him powers against the vampires .
Sent 16: This is explained by the fact that damphyrs inherit the powers of vampires , but none of their weaknesses .
Question: How does Miguel come in contact with Carlos?.
[EX A]: 1, 2, 3.

[EX Q]: Paragraph- Sent 1: (CNN) -- Federal authorities are investigating threatening letters allegedly containing deadly ricin in Spokane, Washington, the FBI said Thursday.
Sent 2: The FBI and the U.S. Postal Inspection Service are trying to find the source of the two letters, intercepted Tuesday during a screening procedure at a postal facility in Spokane, FBI spokeswoman Ayn Sandalo Dietrich said.
Sent 3: "While we cannot offer further comment on this incident, we stress that law enforcement agencies will continue to assess and address the full spectrum of potential threats," she said.
Sent 4: The American Postal Workers Union was notified of the two suspicious letters by the Postal Service, the union said.
Sent 5: One letter was addressed to the Spokane Post Office and the other to a federal judge in Spokane, the union said.
Sent 6: Both were postmarked May 14, the union said.
Sent 7: Postal Service management told employees they weren't at risk from handling the letters because the suspected substance was not in a form that could be inhaled or readily ingested, the union said.
Sent 8: Preliminary lab tests showed the substance to be ricin, the union said.
Sent 9: The union is monitoring the situation, President Cliff Guffey said.
Sent 10: "Our members' safety is our primary concern," he said in a statement.
Sent 11: In an apparently unrelated case, ricin-tainted letters sent to President Obama and others touched off high anxieties in Washington and elsewhere last month.
Sent 12: James Everett Dutschke, 41, of Tupelo, Mississippi, has been charged with possession and use of a biological agent as a weapon in connection with those letters sent to Obama and others.
Question: The FBI and the U.S. Postal Inspection Service are trying to find the source of the two letters which contained what?.
[EX A]: 1, 2.

[EX Q]: Paragraph- Sent 1: As Philip marched south, his opponents blocked him near Chaeronea, Boeotia.
Sent 2: During the ensuing Battle of Chaeronea, Philip commanded the right wing and Alexander the left, accompanied by a group of Philip's trusted generals.
Sent 3: According to the ancient sources, the two sides fought bitterly for some time.
Sent 4: Philip deliberately commanded his troops to retreat, counting on the untested Athenian hoplites to follow, thus breaking their line.
Sent 5: Alexander was the first to break the Theban lines, followed by Philip's generals.
Sent 6: Having damaged the enemy's cohesion, Philip ordered his troops to press forward and quickly routed them.
Sent 7: With the Athenians lost, the Thebans were surrounded.
Sent 8: Left to fight alone, they were defeated.
Sent 9: After the victory at Chaeronea, Philip and Alexander marched unopposed into the Peloponnese, welcomed by all cities; however, when they reached Sparta, they were refused, but did not resort to war.
Sent 10: At Corinth, Philip established a "Hellenic Alliance" (modeled on the old anti-Persian alliance of the Greco-Persian Wars), which included most Greek city-states except Sparta.
Sent 11: Philip was then named Hegemon (often translated as "Supreme Commander") of this league (known by modern scholars as the League of Corinth), and announced his plans to attack the Persian Empire.
Question: Where was Philip named "Hegemon"?.
[EX A]:
10, 11.