んです => Because, by… N4
Situations and Experiences
...たいんですが => want N4
How to say the beginning
どんな...ですか => How N5
Confirm
んですが => opening the story N4
のが~です => to be N4
んです => to explain something; show emphasis N4
... のが...です => Highlight interests and skills N4
Abilities, interests
ものか/ものですか => there's no way ~ N2
んで => Because... N4
Cause, reason
そのはんめん(では) => on the other hand~ N3
Compare
(の中)で~が一番~です => out of this group, [A] is best N5
ですか => Isn't it? N5