`([\d]+), \1((?:\W|$))`

```
^    : Start anchor
(    : Start of capturing group
 \w+ : A word
)    : End of capturing group
\s+  : One or more whitespace
\1   : Back reference to the first word
\b   : Word boundary
```

link:
http://stackoverflow.com/questions/4843582/regular-expression-to-check-if-two-first-words-are-same