sentence: The article states that the most efficient replacement for internal - combustion engines will be fuel - cell engines , because of their various advantages , while the reader refutes this point by stating that hydrogen does not have so many advantages .
modified: The article states that the most efficient substituer of internal - combustion engines will be fuel - cell engines , because of their several advantages , while the lecture refutes this point by stating hydrogen does not have so many advantages .
transformation: NOUN, PREP, ADJ, NOUN, PREP