Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- Prince Albert of Monaco is engaged to former South African Olympic swimmer Charlene Wittstock, the palace announced Wednesday. The 52-year-old prince and ruler of Monaco, the first child of Princess Grace and the late Prince Rainier, has never married. In a 2004 interview with CNN's Larry King, Albert admitted it had taken him "longer than most" to find a wife. "There have been some relationships where, had they gone on a little bit more, they would have headed that way," Albert said. "But I think it's -- it's so much your own timing and your own agenda and the person you want to be with."Monaco's Prince Albert has never marriedRuler of Monaco is son of Princess Grace and Prince RainierAlbert, fiancee are both Olympians 
 Question:The prince and _ have been photographed together many times in the past four years, leading to speculation they would eventually marry.

Charlene Wittstock