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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: Albanian folk music falls into three stylistic groups, with other important music areas around Shkoder and Tirana; the major groupings are the Ghegs of the north and southern Labs and Tosks.
Sent 2: The northern and southern traditions are contrasted by the "rugged and heroic" tone of the north and the "relaxed" form of the south.
Sent 3: These disparate styles are unified by "the intensity that both performers and listeners give to their music as a medium for patriotic expression and as a vehicle carrying the narrative of oral history", as well as certain characteristics like the use of rhythms such as 3/8, 5/8 and 10/8.
Sent 4: The first compilation of Albanian folk music was made by Pjeter Dungu in 1940.
Sent 5: Albanian folk songs can be divided into major groups, the heroic epics of the north, and the sweetly melodic lullabies, love songs, wedding music, work songs and other kinds of song.
Sent 6: The music of various festivals and holidays is also an important part of Albanian folk song, especially those that celebrate St. Lazarus Day, which inaugurates the springtime.
Sent 7: Lullabies and vajtims are very important kinds of Albanian folk song, and are generally performed by solo women. 
Question: When and by whom was the first recorded compilation of Albanian folk music made, and what two purposes does the music serve culturally?.
Output:
3, 4.