Statement with label starts with bracketed content

# Problem

Statements like this are parsed wrongly:

``` markdown
::: statement
__My label__. (At least) two people were present. 
:::
```

The 'At least' part is parsed as statement information. 

# Temporary hack

Use an invisible character to separate the parenthesis, e.g. zero-width non joiner:

``` markdown
::: statement
__My label__. &zwnj;(At least) two people were present. 
:::
```