Table:
Chord

Root

Minor Third

Perfect Fifth

Major Seventh

CmM7

C

E♭

G

B

C♯mM7

C♯

E

G♯

B♯ (C)

D♭mM7

D♭

F♭ (E)

A♭

C

DmM7

D

F

A

C♯

D♯mM7

D♯

F♯

A♯

C (D)

E♭mM7

E♭

G♭

B♭

D

EmM7

E

G

B

D♯

FmM7

F

A♭

C

E

F♯mM7

F♯

A

C♯

E♯ (F)

G♭mM7

G♭

B (A)

D♭

F

GmM7

G

B♭

D

F♯

G♯mM7

G♯

B

D♯

F (G)

A♭mM7

A♭

C♭ (B)

E♭

G

AmM7

A

C

E

G♯

A♯mM7

A♯

C♯

E♯ (F)

G (A)

B♭mM7

B♭

D♭

F

A

BmM7

B

D

F♯

A♯

This image displays a table. Could you provide me with the row number and column number corresponding to this table? The final result should be presented in the JSON format of {"row_number": "m", "column_number": "n"}.

This table has 18 rows and 5 columns. Thus, the final answer is {"row_number": "18", "column_number": "5"}.