English to French Law/Patents Law: Patents, Trademarks, Copyright

Je n'arrive pas à me départir d'un doute angoissant quant à la signification de "contend" dans la 2è phase ci-dessous :
It was common ground that for priority claim 19 can be treated as two distinct claims depending on its dependencies in the same way as I treated a claim in HTC v Gemalto [2013] EWHC 1876 (Pat), paragraph 121. As a distinct issue, the claimants **contend*** claim 19 is not entitled to priority in any event, irrespective of claim dependency. That argument relates to the feature of claim 19 about dosing, which the claimants contend is not supported by the priority document.

Est-ce que les requérantes contestent que la revendication 19 ne soit en aucun cas éligible à la priorité
ou bien
est-ce qu'elle soutiennent que la revendication 19 n'est éligible à la priorité en aucun cas ?