You will be given a definition of a task first, then some input of the task.
Indicate a text span in the passage about which an inquisitive question is asked. (note, don't answer the question).

Sentence: As a result , Canada ' s trade surplus with the U . S . narrowed to C $ 656 . 5 million ( US $ 558 million ) in August from C $ 1 . 23 billion ( US $ 1 . 04 billion ) in July .<sep>Question: How has this decrease in surplus affect trading?
Output:
narrowed