TASK DEFINITION: In this task, you are given a piece of an article. Your task is to generate a short summary of the text. Try to give the summary in just one sentence.
PROBLEM: French energy giant Total will return to Iran, if international sanctions are lifted on petroleum exports, chief executive Christophe de Margerie said at an industry conference here on Tuesday, AFP news agency reported.

SOLUTION: Total will return to Iran, if sanctions are lifted.

PROBLEM: Davis and British actress Kathryn Camsey welcomed a daughter on 28 December.

SOLUTION: Three Port Authority officers have filed a federal lawsuit seeking to overturn promotions.

PROBLEM: Lewis Hamilton hailed Formula One rival Sebastian Vettel as a great champion yesterday, only days after suggesting the German's dominance was sending fans to sleep.

SOLUTION:
Lewis Hamilton hailed Sebastian Vettel as a great champion.