Teacher:In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Teacher: Now, understand the problem? Solve this instance: The first step in treating a fistula is usually an examination by a doctor .
Student:
Typically the first step in treating a fistula is an examination by a doctor to determine the extent and " path " that the fistula takes through the tissue .