"Area in tundra is a very fragile ecosystem that has been developing for a very long time," Kerekes said.
(a very fragile ecosystem; has been developing; T:for a very long time) (Area in tundra is a very fragile ecosystem; said; Kerekes) Context(Area in tundra is a very fragile ecosystem said,List([1, 104))):(Area in tundra; is; a very fragile ecosystem that has been developing for a very long time)
Area in tundra is a very fragile ecosystem said,List([1, 104))
a very fragile ecosystem Area in tundra is a very fragile ecosystem Area in tundra
has been developing said is
T:for a very long time
Kerekes
a very fragile ecosystem that has been developing for a very long time