user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: centimetre–gram–second system of units uses what type of unit of energy? 
Knowledge Triplets: length, type.property.unit, Centimeter
Centimetre–gram–second system of units, measurement_unit.measurement_system.acceleration_units, Gal
International System of Units, measurement_unit.measurement_system.temperature_units, Kelvin
Eclipse (secs dark), type.property.unit, Second
Maximum Height, type.property.unit, Centimeter
Time, measurement_unit.dimension.units, Second
Frame Size, type.property.unit, Centimeter
Burn time, type.property.unit, Second
Winning time, type.property.unit, Second
Saturates, type.property.unit, Gram
Temperature range (high), type.property.unit, Kelvin
Centimetre–gram–second system of units, measurement_unit.measurement_system.charge_units, Statcoulomb
Magnetic field, measurement_unit.dimension.units, Oersted
Diameter, type.property.unit, Centimeter
Centimetre–gram–second system of units, measurement_unit.measurement_system.density_units, Gram per cubic centimetre
Time Offset, type.property.unit, Second
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.base_units, Centimeter
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.unit_of_lenght, Centimeter
Meteorite Mass, type.property.unit, Gram
Centimetre–gram–second system of units, measurement_unit.measurement_system.energy_units, Erg
Centimetre–gram–second system of units, measurement_unit.measurement_system.pressure_units, Barye
Carbohydrate, type.property.unit, Gram
Maximum Animation Length (in seconds), type.property.unit, Second
Snowfall, type.property.unit, Centimeter
End time, type.property.unit, Second
Minimum Height, type.property.unit, Centimeter
Time, type.property.unit, Second
Stilb, measurement_unit.luminance_unit.measurement_system, Centimetre–gram–second system of units
Specific impulse, type.property.unit, Second
Fat, type.property.unit, Gram
Acceleration (0-100 KPH), type.property.unit, Second
60-yard shuttle time, type.property.unit, Second
Flash (secs lit), type.property.unit, Second
Melting temperature, type.property.unit, Kelvin
Pressure, measurement_unit.dimension.units, Barye
Horn or Antler Length, type.property.unit, Centimeter
Energy, measurement_unit.dimension.units, Erg
Weight, type.property.unit, Gram
Erg, measurement_unit.energy_unit.measurement_system, Centimetre–gram–second system of units
Half-life, type.property.unit, Second
Intro Length, type.property.unit, Second
Seat Tube Length, type.property.unit, Centimeter
Polyunsaturates, type.property.unit, Gram
Centimetre–gram–second system of units, measurement_unit.measurement_system.current_units, Abampere
Running Time, type.property.unit, Second
Centimetre per second, measurement_unit.speed_unit.measurement_system, Centimetre–gram–second system of units
International System of Units, measurement_unit.measurement_system.time_units, Second
20-yard shuttle time, type.property.unit, Second
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.base_units, Second
Electric charge, measurement_unit.dimension.units, Statcoulomb
Measurement Temperature, type.property.unit, Kelvin
Sugars, type.property.unit, Gram
Start time, type.property.unit, Second
Running time, type.property.unit, Second
Serving size, type.property.unit, Gram
Fiber, type.property.unit, Gram
Burn Time, type.property.unit, Second
Protein, type.property.unit, Gram
Trans fat, type.property.unit, Gram
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.unit_of_mass, Gram
m.0h7jk8x, dataworld.gardening_hint.last_referenced_by, Centimetre–gram–second system of units
Wheelbase, type.property.unit, Centimeter
Bottom Bracket Height, type.property.unit, Centimeter
Density, measurement_unit.dimension.units, Gram per cubic centimetre
Centimetre–gram–second system of units, base.schemastaging.context_name.pronunciation, g.125_mqyp3
Gram, measurement_unit.mass_unit.measurement_system, International System of Units
Density, type.property.unit, Gram per cubic centimetre
Centimetre–gram–second system of units, measurement_unit.measurement_system.speed_units, Centimetre per second
Mean density, type.property.unit, Gram per cubic centimetre
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.unit_of_temperature, Kelvin
Gauss, measurement_unit.magnetic_flux_density_unit.measurement_system, Centimetre–gram–second system of units
Length, type.property.unit, Centimeter
Acceleration time from 0 to 100 km/h in seconds, type.property.unit, Second
Frame Height, type.property.unit, Centimeter
Salt equivalent, type.property.unit, Gram
Atmospheric Temperature, type.property.unit, Kelvin
Zero point in kelvins, type.property.unit, Kelvin
Temperature range (low), type.property.unit, Kelvin
Acceleration, type.property.unit, Second
Standover Height, type.property.unit, Centimeter
Acceleration, measurement_unit.dimension.units, Gal
Temperature, measurement_unit.dimension.units, Kelvin
LCD Screen Size, type.property.unit, Centimeter
Centimeter, measurement_unit.distance_unit.measurement_system, Centimetre–gram–second system of units
Centimetre–gram–second system of units, measurement_unit.measurement_system.magnetic_flux_density_units, Gauss
Gal, measurement_unit.acceleration_unit.acceleration_in_meters_per_second_squared, 0.01
Centimetre–gram–second system of units, measurement_unit.measurement_system.magnetic_field_strength_units, Oersted
Start Time, type.property.unit, Second
Oersted, measurement_unit.magnetic_field_strength_unit.measurement_system, Centimetre–gram–second system of units
Sodium, type.property.unit, Gram
End Time, type.property.unit, Second
Duration, type.property.unit, Second
Temperature, type.property.unit, Kelvin
Quantity per 100g, type.property.unit, Gram
Relevant temperature, type.property.unit, Kelvin
Top Tube (Actual), type.property.unit, Centimeter
Acceleration (0-60 MPH), type.property.unit, Second
Electric charge, measurement_unit.dimension.units, Abcoulomb
Sequence duration, type.property.unit, Second
3-cone drill time, type.property.unit, Second
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.base_units, Kelvin
Speed, measurement_unit.dimension.units, Centimetre per second
lenght, type.property.unit, Second
hasHeight, type.property.unit, Centimeter
Gal, measurement_unit.acceleration_unit.measurement_system, Centimetre–gram–second system of units
Runtime, type.property.unit, Second
Record Time, type.property.unit, Second
Isp (vacuum), type.property.unit, Second
Gram per cubic centimetre, measurement_unit.unit_of_density.measurement_system, Centimetre–gram–second system of units
Wingspan, type.property.unit, Centimeter
Luminance, measurement_unit.dimension.units, Stilb
Time In Seconds, type.property.unit, Second
Abcoulomb, measurement_unit.charge_unit.measurement_system, Centimetre–gram–second system of units
Standover, type.property.unit, Centimeter
Statcoulomb, measurement_unit.charge_unit.measurement_system, Centimetre–gram–second system of units
Mono-unsaturates, type.property.unit, Gram
Centimetre–gram–second system of units, measurement_unit.measurement_system.length_units, Centimeter
Erg, measurement_unit.energy_unit.energy_in_joules, 7e-07
Length, measurement_unit.dimension.units, Centimeter
Barye, measurement_unit.pressure_unit.measurement_system, Centimetre–gram–second system of units
Top Tube (Virtual), type.property.unit, Centimeter
Top Tube Length, type.property.unit, Centimeter
Measurement, type.property.unit, Centimeter
Body Length, type.property.unit, Centimeter
Centimetre–gram–second system of units, measurement_unit.measurement_system.charge_units, Abcoulomb
Sample Ending Offset, type.property.unit, Second
Mass, type.property.unit, Gram
Chain Stay, type.property.unit, Centimeter
40-yard dash time, type.property.unit, Second
Electric current, measurement_unit.dimension.units, Abampere
Isp (sea level), type.property.unit, Second
typical weight, type.property.unit, Gram
Max Video Length (in seconds), type.property.unit, Second
Serving Size, type.property.unit, Gram
Average Surface Temperature, type.property.unit, Kelvin
Centimetre–gram–second system of units, measurement_unit.energy_unit.measurement_system, Erg
Date resolution, type.property.unit, Second
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.unit_of_time, Second
Length, type.property.unit, Second
Height, type.property.unit, Centimeter
Time Started Playing, type.property.unit, Second
Centimetre–gram–second system of units, user.movgp0.default_domain.measurement_system.base_units, Gram
cgs.noun.01, base.wordnet.synset.equivalent_topic, Centimetre–gram–second system of units
Centimetre–gram–second system of units, measurement_unit.measurement_system.luminance_units, Stilb
Abampere, measurement_unit.current_unit.measurement_system, Centimetre–gram–second system of units
Time Ended, type.property.unit, Second
Sample offset, type.property.unit, Second
Tail Length, type.property.unit, Centimeter
Magnetic flux density, measurement_unit.dimension.units, Gauss

Answer: Erg