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

The current time is April 19th 2014, 17:15:12

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

metre
is the second parameter of
0.91 metres

I know from locally stored knowledge that:

Fact 1:
100
is the multiplier that converts
metre and centimetre
([fact: ["127371817@trueknowledge.com"]])

Fact 1
is true for
all time
([fact: ["1050410778@trueknowledge.com"]])

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

Fact 1
is true at
April 19th 2014, 17:15:12

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

0.91
is the first parameter of
0.91 metres

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

91.0
is the product of
100 and 0.91

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

length
is the class of the parametered object
0.91 metres

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

91.0 centimetres
is the parametered object corresponding to
length and 91.0 and centimetre

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

Fact 2:
91.0 centimetres
is equivalent to
0.91 metres

Fact 2
is true at
April 19th 2014, 17:15:12

Fact 2:
centimetre
is the unit used in
91.0 centimetres