1: Nevertheless , the trial court summoned him and some other corporate leaders to testify in person on April 8 , she said . 2: The case Singh has been asked to appear for relates to the licensing of a coal block to a private firm some 10 years ago , when he was also guardian of the nation 's coal ministry . 3: Due to appear on April 8 ; case relates to the licensing of a coal block to a private firm 10 years ago .
1: testify 2: appear 3: appear