Assertion: wasp's nest | /r/MadeOf | gray or brown papery material
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Source sentences:
text: Paper wasps are vespid wasps that gather fibers from dead wood and plant stems, which they mix with saliva, and use to construct water-resistant nests made of gray or brown papery material.
text: Paper wasps are 3/4 inch to 1 inch (2-2.5 cm)-long wasps that gather fibers from dried plant stems, which they mix with saliva, and use to construct water-resistant nests that appear to be made of gray or brown papery material.