Kunming Metro
Operational
Table:
Line

Terminals
(District)

Commencement

Newest
Extension

Length
km

Stations

1 2

North Coach Station
(Panlong)

University Town South
(Chenggong)

2013

2016

45.7

35

Kunming South railway station
(Chenggong)

3

Western Hills Park
(Xishan)

East Coach Station
(Panlong)

2017

—

23.4

20

6

East Coach Station
(Panlong)

Airport Center
(Guandu)

2012

-

18.1

4

Total

87.2

59

Considering the tabular data covering the 'Operational' part of 'Kunming Metro', draft a brief sentence that explains what the highlighted cells show and format it within the following JSON object {"answer": "YOUR ANSWER"}.