Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| line | terminals | status | length | total number of stations | operator |
| line 1 | etxebarri / plentzia | complete | 31 km | 29 | metro bilbao sa |
| line 2 | basauri / kabiezes | complete | 20 km | 25 | metro bilbao sa |
| mamariga shuttle | santurtzi / mamariga | complete | 500 m | 2 | metro bilbao sa |
| line 3 | etxebarri - norte / matiko | under construction | 5.885 km | 7 | metro bilbao sa |
| airport line | matiko / aireportua | under construction | 6.491 km | 3 | euskotren |
| line 4 | matiko / rekalde | in studies | 6 km | 7 | metro bilbao sa |
| line 5 | etxebarri / usansolo | in studies | 8 , 8 km | 6 | metro bilbao sa |
Title:
metro bilbao
Statement:
the the status of the airport line is under construction
Answer:
supported