source: [lemma=to] □
destination: [lemma=to] □ □
spec: Fingerhut was the first mail order marketer to offer its customers the opportunity to buy proprietary products by credit , and was a pioneer in free " trial " gift offers and computer personalized formats . I assumed that the first batch of convergence tests would be familiar from calculus , but this really seemed not to be the case ) and I can honestly say that almost everyone improved steadily and significantly throughout .