Final answer:
The question provides incorrect information about Gwen Graham and Cathy Wood. The No. 1 Canadian General Hospital in Etaples, France, during World War I was bombed on May 19, 1918, resulting in casualties which included the loss of three nursing sisters.
Step-by-step explanation:
The women mentioned, Gwen Graham and Cathy Wood, are not related to the historical context of the question provided. Instead, the details describe the No. 1 Canadian General Hospital, located in Etaples, France, which suffered significant damage during World War I. In a tragic event on the evening of May 19, 1918, the hospital was subjected to a bombing raid by fifteen German aircraft. The bombing raids resulted in numerous casualties, including the death of three Canadian nursing sisters and injuries to others.
Among those lost were Nursing Sisters Katharine Macdonald, Gladys Wake, and Margaret Lowe. For their bravery during the attacks, Nursing Sisters Hélène Hanson and Beatrice McNair were awarded the Military Medal.