Find the most likely cause
A group of people in a room start coughing.
The most likely cause of a group of people in a room starting to cough could be due to poor air quality or presence of an irritant in the air such as dust, smoke or a strong odor. Other potential causes could be the spread of a respiratory illness, a sudden change in temperature or humidity, or an allergic reaction. However, without additional information, it is difficult to determine the exact cause.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find the most likely cause

### Input:
A group of people in a room start coughing.

### Output:
The most likely cause of a group of people in a room starting to cough could be due to poor air quality or presence of an irritant in the air such as dust, smoke or a strong odor. Other potential causes could be the spread of a respiratory illness, a sudden change in temperature or humidity, or an allergic reaction. However, without additional information, it is difficult to determine the exact cause.