§ 1102. Contents of petition. The petition must be in writing and
verified by the affidavit of the petitioner, to the effect that the
matters of fact therein set forth are true. It must contain:

a. A description of the real property and a statement of the
petitioner's interest therein and of such other facts as show that the
case is within the provisions of section 1101;

b. An averment that the petitioner believes that the person upon whose
life the prior estate depends is dead, together with a statement of the
grounds upon which the petitioner's belief is founded.