Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How old is the person who wrote Dreamlover? Passage:A day following its impact on US radio stations, "Shake It Off" gained an audience of nine million. The song debuted at 45 on the Billboard Radio Songs chart with 29 million in all-format audience. It debuted on the Mainstream Top 40 chart at number 12, tying it with Mariah Carey's "Dreamlover" (1993) as the highest chart debut. "Shake It Off" became her third number-one song there, following her 2008 country crossover hit single "Love Story" and her 2013 hit "I Knew You Were Trouble", which remained No. 1 for seven consecutive weeks. The single debuted at number nine on the Billboard Adult Top 40 chart, becoming the highest debut single on the chart. On its sixth week, the song became her second No. 1 on the Adult Top 40 chart since her 2013 hit "I Knew You Were Trouble", tying it with Celine Dion's "Because You Loved Me" (1996) as the fastest song to reach number 1 in just six weeks. The song debuted at number 58 on the Country Airplay chart, though only two country stations played the song more than four times. It spent only one week on the chart. Billboard noted that its presence on the chart was unusual due to its sound and Swift's acknowledged transition from country to pop music. On the Radio Songs chart, the song became Swift's third number-one song there, following her 2013 hit "I Knew You Were Trouble". "Shake It Off" has spent four non-consecutive weeks at No. 1 on the Digital Songs chart.


b