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

The current time is April 20th 2014, 13:57:52

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

imperial quart
is the second parameter of
71 imperial quarts

I know from locally stored knowledge that:

Fact 1:
4
is the multiplier that converts
US gallon and imperial quart
([fact: ["1941107874@trueknowledge.com"]])

Fact 1
is true for
May 10th 2011, 00:00:00 onwards
([fact: ["1941107878@trueknowledge.com"]])

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

1/4
is the quotient of
1 and 4

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

Fact 2:
1/4
is the multiplier that converts
imperial quart and US gallon

Fact 2
is true for
May 10th 2011, 00:00:00 onwards

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

Fact 2
is true at
April 20th 2014, 13:57:52

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

71
is the first parameter of
71 imperial quarts

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

17 3/4
is the product of
1/4 and 71

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

volume
is the class of the parametered object
71 imperial quarts

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

17 3/4 US gallons
is the parametered object corresponding to
volume and 17 3/4 and US gallon

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

Fact 3:
17 3/4 US gallons
is equivalent to
71 imperial quarts

Fact 3
is true at
April 20th 2014, 13:57:52

Fact 3:
US gallon
is the unit used in
17 3/4 US gallons