With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Adventist churches usually practice open communion four times a year. It commences with a foot washing ceremony, known as the "Ordinance of Humility", based on the Gospel account of John 13. The Ordinance of Humility is meant to emulate Christ's washing of his disciples' feet at the Last Supper and to remind participants of the need to humbly serve one another. Participants segregate by gender to separate rooms to conduct this ritual, although some congregations allow married couples to perform the ordinance on each other and families are often encouraged to participate together. After its completion, participants return to the main sanctuary for consumption of the Lord's Supper, which consists of soft, risen bread loaves and unfermented grape juice.
text_B: If a church had wanted to continue to perform this ritual, and to serve the Lord's Supper with freshly made bread in the year 2020 A.D., would a crippling shortage of yeast at the local grocery stores have been a hindrance to them?
YES.