In this task, given a sentence in the Chinese language, your task is to convert it into the English language.

SDMA执行董事洛克萨纳·贝拉斯克斯描述了他们遗赠的收藏品的“稀有性”，并表示这些收藏品将为现有的两个博物馆收藏品增加“深度”。
Roxana Velásquez, SDMA executive director, described their bequeathed collection's "rarity" and said the pieces would add "depth" to the two existing museum collections.