By calculation (generator: ["now@trueknowledge.com"]) I know that:

The current time is April 23rd 2014, 22:54:51

I know from locally stored knowledge that:

Fact 1:
1.727 metres
is the height of
Adolf Hitler
([fact: ["151625029@trueknowledge.com"]])

Fact 1
is true for
September 24th 2008 onwards
([fact: ["151625033@trueknowledge.com"]])

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:

Fact 1
is true at
April 23rd 2014, 22:54:51

By calculation (generator: ["second_parameter@trueknowledge.com"]) I know that:

metre
is the second parameter of
1.727 metres

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:

1.727
is the first parameter of
1.727 metres

By calculation (generator: ["product@trueknowledge.com"]) I know that:

5.66601049868766
is the product of
3.28083989501312 and 1.727

By calculation (generator: ["class_parametered_object@trueknowledge.com"]) I know that:

length
is the class of the parametered object
1.727 metres

By calculation (generator: ["parametered_object_corresponding_to@trueknowledge.com"]) I know that:

5.66601049868766 feet
is the parametered object corresponding to
length and 5.66601049868766 and foot

By calculation (generator: ["equivalent_to6@trueknowledge.com"]) I know that:

Fact 2:
5.66601049868766 feet
is equivalent to
1.727 metres

Fact 2
is true at
April 23rd 2014, 22:54:51

Fact 2:
foot
is the unit used in
5.66601049868766 feet