When the government in 1989 started asking parents to provide the Social Security number of their putative day-care provider, claims for credits dropped markedly.)
In 1989 the government asked parents to provide the Social Security number of their day-care provider.
mnli hypothesis: In 1989 the government asked parents to provide the Social Security number of their day-care provider. premise: When the government in 1989 started asking parents to provide the Social Security number of their putative day-care provider, claims for credits dropped markedly.)