We can classify the sentence shown above as a qualifier. That's because the term "qualifier," refers to a sentence (or a word, in some cases) that has the ability to attribute a characteristic, or a quality, an ability to something or someone.
In the sentence shown above, you can see that the speaker is assigning a characteristic to a group of people, when he informs you that this group will be able to provide suitable materials for a certain activity. This ability to provide adequate materials is what makes us realize that this sentence is an example of a qualifier.
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