Problem: Sentence: "The concert continued until 10."; Another sentence: "In the middle of the outdoor concert, the rain started falling, and it continued until 10."?
A: no

Problem: Sentence: "Mary tucked her daughter Anne into bed, so that Mary could work."; Another sentence: "Mary tucked her daughter Anne into bed, so that she could work."?
A: yes

Problem: Sentence: "Men had the right to keep their sons working for them until the sons were 21 years of age."; Another sentence: "Men had the right to keep their sons working for them until they were 21 years of age."?
A:
yes