In this task, you are given a sentence. You must find the primary subject in the supplied sentence. The output must be a sub-sequence in the sentence.

Example Input: New and untreated hemp rope is hard, smooth, pale grey in colour and of a lighter shade than manila but darker than sisal.
Example Output: New and untreated hemp rope

Example Input: General characteristics.
Example Output: General characteristics.

Example Input: When mature the abaca plant, which grows to a height of from 10 to 30 ft, is felled and the fibre from the leaf sheaths is stripped off.
Example Output:
the abaca plant

