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

The current time is April 20th 2014, 23:42:27

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

foot
is the second parameter of
90 feet

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

90
is the first parameter of
90 feet

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

30
is the product of
1/3 and 90

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

length
is the class of the parametered object
90 feet

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

30 yards
is the parametered object corresponding to
length and 30 and yard

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

Fact 1:
30 yards
is equivalent to
90 feet

Fact 1
is true at
April 20th 2014, 23:42:27

Fact 1:
yard
is the unit used in
30 yards