Assertion: castor oil | /r/HasProperty | 3-4 pieces
Facets:
Source sentences:
text: Materials needed: castor oil (preferably cold pressed/processed), unbleached wool or cotton flannel (3-4 pieces or layers about 12" x 14" each), a 13-gallon trash bag (cut along the edges that seal it thus giving you two identical rectangular pieces), a standard or extra-large electric heating pad or hot water bottle, a large plastic sheet (such as an inexpensive shower curtain liner), an old sheet, paper towels, baking soda, and a wash cloth or sponge.