A number of multi-city and other types of studies strongly suggest that these effects-relationships cannot be explained by weather, statistical approaches, or other pollutants.
There are studies that point out that weather cannot explain these effects-relationships.
Several studies proved that weather can be used to explain these effects-relationships.
The people sit in the park.
That was done nonsensically.
She's calling me.
It could be important.
The girl is preparing for an event.
A reduction of $2 requires assistance.