So it is not surprising that when bubonic plague struck in 1894, it took nearly 30 years to fully eradicate it.
It was very surprising for people to see that it took so long to cure it.
mnli hypothesis: It was very surprising for people to see that it took so long to cure it. premise: So it is not surprising that when bubonic plague struck in 1894, it took nearly 30 years to fully eradicate it.