[eye30]

Sara saw seven sharks while swimming.

[AlanHo]

Four

[The Gonz]

Alan is sharp as ever.

[AlanHo]

Alan is sharp as ever.

I keep cutting myself......

[eye30]

Four

No.

Try again

[Dazzler]

I initially thought 6 then assumed it was trick and as Alan had done just counted how many in title sentence. 

[Shambles]

None.  'Cos I can't count.

[Paolo5]

Two

[Dazzler]

Two

Oh yes, i can see what you've done there..   

[Paolo5]

Two

Oh yes, i can see what you've done there..   

But who wins the chocolate frog? 

[Dazzler]

Two

Oh yes, i can see what you've done there..   

But who wins the chocolate frog? 

More to the point who's going to pay the postage?

[AlanHo]

One

[The Gonz]

Also a worthy anSwer, Alan.

[eye30]

Two

Nope

[eye30]

One

Give that man a bread maker

[AlanHo]

There are two ways of arriving at "One"

1. There is only one capital S

or

2. The question refers to just the word 'sentence'

I have no idea which answer Lester thought of while he blew the head off his lively pint..