    Sentence . 1: ‘Sanchez ‘ de‘ Lozada’. promiited _a  referendum: on’ @ controversial gas: project ;-a  reform of .:a -free’,matket-. énergy law , and  constitutional reforms ..    Sentence 2: Sonchéz.‘de” Lozada ‘promised ‘a  referendum on the. gas project., a reform of enérgy.  laws and constitutional changes .