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 Input:
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 Output:
1, 2, 3.

Ex Input:
Paragraph- Sent 1: (CNN) -- English club Chelsea have completed the signing of Oriol Romeu from Spanish and European champions Barcelona.
Sent 2: The 19-year-old is currently playing for Spain at the World Under-20 Championships in Colombia and has signed a four-year deal with last season's Premier League runners-up.
Sent 3: The deal is worth $7 million and includes a buy back clause, set at $14 million after the first year and $21 million after the second.
Sent 4: Romeu started his career at Barcelona's city rivals Espanyol before joining the Camp Nou academy in 2004.
Sent 5: The midfielder, who can also play in central defence, made his debut for Barcelona in last season's Spanish Supercup match with Seville and got his first taste of league action against Deportivo in May 2010.
Sent 6: He has played 90 minutes in both of Spain's games at the World Under-20 Championships, when they beat Costa Rica and Ecuador.
Sent 7: Chelsea official web site confirmed the signing and said Romeu is "renowned for his strength and his expansive passing ability."Sent 8: Another player leaving Barcelona is Jeffren Suarez after he agreed to join Sporting Lisbon.
Sent 9: The Portuguese outfit have paid $5 million for the 23-year-old which, like the Romeu deal, includes a buy back option.
Sent 10: Jeffren joined Barca from Tenerife in 2004 and made his debut for the Catalan club in the 2006-07 season.
Question: How much is the 19-year-old's deal worth?.

Ex Output:
2, 3.

Ex Input:
Paragraph- Sent 1: Eric , a young boy , is excited about his birthday after reading a book and believes that a train will come for him , despite his sister Jill 's disbelief .
Sent 2: A few hours later , the train station 's control tower wakes up and in the roundhouse , Tillie , a young little blue switcher engine , along with her best bird friend , Chip , wakes up four other trains : Georgia , a kind all-purpose engine , Farnsworth , a stuck-up passenger engine , Jebediah , a worn-out old engine , and Pete , a gruff , burly freight engine .
Sent 3: After the tower assigns Farnsworth and Pete their jobs , Tillie tries to help with the milk train assigned to Jebediah , but the tower insists that she is too small for the job .
Sent 4: Georgia is assigned to pull the birthday train .
Sent 5: A clown named Rollo leads the toys into the train , including Stretch , a basketball player ; Missy , a ballerina ; a Handy Pandy , a panda ; Perky , an elephant ; and Grumpella , a stuffed bird .
Sent 6: During her journey , Georgia breaks down and is taken back to the roundhouse by Doc .
Sent 7: Left behind , Rollo eventually takes Doc 's advice of flagging down one of the other engines returning from their daily runs over the mountain .
Sent 8: Farnsworth and Pete turn down their offers to pull the train .
Sent 9: Meanwhile , Tillie asks the tower to rescue the stranded train , but he insists that Tillie will never do the job .
Sent 10: Jebediah turns down his offer to pull the train because of his age , and returns to the roundhouse .
Sent 11: Chip and Tillie sneak past the sleeping tower and pulls the birthday train up a mountain .
Question: who tries to help with the milk train assigned to Jebediah?.

Ex Output:
3.