instruction:
In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
question:
Context: Graf lost an Australian Open quarterfinal to Jana Novotná, the first time she did not reach the semifinals of a Grand Slam singles tournament since the 1986 French Open Link Information: none Answer: none
answer:
How many grand slam tournaments did Steffi Graf win over her career?


question:
Context: Bianco produced "Rear View Mirror" for multi-platinum recording artist Mýa, featuring Sean Paul, Link Information: After graduating from Eleanor Roosevelt High School in Greenbelt, Maryland at 16 Answer: 1996 
answer:
Between the main recording artist and the featured one on "Rear View Mirror", what year did the younger one graduate from high school?


question:
Context: The body of the Unknown Warrior was carried to London in South Eastern and Chatham Railway General Utility Van No.132, which had previously carried the bodies of Edith Cavell and Charles Fryatt. Link Information: 

Edith Louisa Cavell (; 4 December 1865 – 12 October 1915 Answer: 9
answer:

How much time was between the deaths of the people carried by General Utility Van No. 132 before the Unknown Warrior?