Are you a fan of the guitar? Conventionally, they have 6 strings.
Yes! I own a Yamaha guitar but it's been so difficult to self learn. Do you know when the first guitar was invented? 
I'm not so sure, but it usually has a hollow wooden or plastic casing.
Yeah, they produce such a nice sound! Do you know how many variants you can get of the guitar?
It is a type of chordophone, for what that's worth. Some have guts and can tune.
That's interesting, i didn't know that. What else can you tell me about the guitar? 
The tone is created by the vibration of the string.