(a) Forms of Pleadings. Forms of action and technical forms for seeking relief and of pleas, pleadings, or motions are abolished. (b) Claims for Relief. A pleading which sets forth a claim for relief, whether an original claim, counterclaim, crossclaim, or third-party claim, must state a cause of action and must contain: (1) a short and plain statement of the grounds on which the court's jurisdiction depends, unless the court already has jurisdiction and the claim needs no new grounds of jurisdiction