中 => Throughout, all over, during the course of N5
Time
[尊敬語「そんけいご」] => Respectful form of A N4
Honorifics
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
[謙譲語「けんじょうご」] => Humble form of A, humble form of する verbs N4
Honorifics
ものの => Although A... N2
Contrast,Surprise
の => Question N5
Particles
ぐらいのものだ => Only A N1
(Not)only , (Not) even
の => A kind of question N3
Sentence Endings
たもの => Used to N3
Sentence Endings
の => Turn sentence into question N4
Sentence Endings
もの => Because of A N2
Reason, Result, Response