[06] The six injured included a 9-year-old girl and two 10-year-old girls, but their injuries are not life-threatening, police officials said.

＊include＜動詞３＞含む
＊injury＜名詞＞けが
＊life-threatening＜形容詞＞命に関わる

イメージ３とイメージ２です。

名詞Aは、The six injured peopleということです。

[06] The six injured included a 9-year-old girl and two 10-year-old girls, but their injuries are not life-threatening, police officials said.

「６人の負傷者は、９歳の少女１人と10歳の少女２人を含んでいたが、彼らのけがは命に関わるものではない（警察が語った）。」