Holding that, in assessing FSIA jurisdiction, district court should "review the allegations in the complaint, the undisputed facts, if any, placed before it by the parties, and—if the plaintiff comes forward with sufficient evidence to carry its burden of production on this issue—resolve disputed issues of fact, with the defendant foreign sovereign shouldering the burden of persuasion"
Holding that contractual provision stating that "[a]ny dispute arising between the parties hereunder shall come within the jurisdiction of the competent Greek Courts" was a permissive forum selection clause
Holding that a third-party beneficiary to a charter party “must show that ‘the parties to that contract intended to confer a benefit on [it] when contracting; it is not enough that some benefit incidental to the performance of the contract may accrue to [it]’ ” (alterations in original) (quoting McPheeters v. McGinn, Smith & Co., 953 F.2d 771, 773 (2d Cir.1992))