～ingの解釈
Linguists believe that, among the world’s 6,800 languages, half to 90 % could be extinct by 2100. One reason is that half of all languages are spoken by fewer than 2,500 people, though languages need at least 100,000 speakers to pass from generation to generation. Of course, that languages die is not new; thousands are believed to have disappeared already. The distinguishing thing is that it is happening at such an alarming rate right now. When a language dies, linguists, anthropologists and others lose rich sources of material for their work recording a people’s history, finding out what they knew and tracking their movements from region to region. In order for the world not to become linguistically less diverse, governments can help by encouraging people, especially children, to speak other languages in addition to their native tongues.
（質問）When a language dies,～ recording a people’s history, finding out what they knew and tracking their movements from region to region.
上記の～ingの解釈に戸惑っています。色々考えた結果、recording/ finding/ and trackingはworkにかかる動名詞（～するための）ではないかと思うのですがいかがでしょうか？また自分は「a sleeping bag」などの名詞の前に動名詞を置く用法しか知らなかったのですが、このように後置パターンもあるのでしょうか？もしご存知なら例文を添えていただけると幸いです。
お礼
I wish to express my gratitude.