It is significant! 
It's significant!
It isn't significant.
In other places the implicit remains quietly understood as always
There are two people.
There are a number of children that roam the roads.
There has never been any development for methods of assessing reliability of observations, techniques for transforming very large amounts of qualitative data, and methods for aggregating qualitative data or findings from several sites.
A group of  people are standing.
The football players are on a muddy field.