TASK DEFINITION: This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.
PROBLEM: 'i love doing that , ' kalten said blithely .

SOLUTION: 'i love those things , 'kalten said in frustration .

PROBLEM: the main issues are high cost , low energy density and heavy weight of batteries .

SOLUTION: the main problems are high costs , low energy concentrations and a high battery charge , which greatly limits the commuter distance .

PROBLEM: gods , was i ever that skinny ? he thought .

SOLUTION:
gods , did i really once have been so terribly thin ? he thought .