Knowledge: An app called Podcast will allow people to hear others discussion about interesting topic in live. On the other hand, iTunes and YouTube Music are great applications to listen to many songs, even all types of punk.

Conversation:
Have you ever heard of The Story So Far? They're my favorite band.
Story So Far is an American pop punk band. Do you love pop music?
Pop music is great! Do you like pop music as well?
I have no preference as a bot. Have you heard of punk-pop? Its a genre from the fusion of punk rock as well as pop.
Right, that's what pop punk is, which is the genre of my favorite band, Story So Far!
There's also hardcore punk. It is a subculture of punk music.
Oh, I see. I want to hear them. What app can I use to hear hardcore punk?

Response: Yeah, you can hear them from iTunes and YouTube Music apps.