In 1998, the control of the rights to most of the literary works of Agatha Christie passed to the company Chorion, when it purchased a majority 64% share in Agatha Christie Limited.
Agatha Christie is happy that the company Chorion owns the majority share of her company. 
mnli hypothesis: Agatha Christie is happy that the company Chorion owns the majority share of her company.  premise: In 1998, the control of the rights to most of the literary works of Agatha Christie passed to the company Chorion, when it purchased a majority 64% share in Agatha Christie Limited.