Table:
Name	Topic	Cost	Target age	Advertising

Ask A Biologist	Biology	Free	5+	None

Archimedes-lab.org	Mathematics	Free	10+	Yes - limited

Awesome Library	All	Free	All	Yes - large

Bitesize by the BBC	Art & Design, Business Studies, Design & Technology, DiDA, Drama, English, English Literature, French, Geography, German, History, ICT, Irish, Maths, Music, Physical Education, Religious Studies, Science, Spanish	Free	5-16	None

BrainPop	Science, Social studies, English, Maths, Art & Music, Health, Technology	from US$75/year	4-17	None

Cut-the-Knot	Maths	Free	8+	Yes - extensive

Fact Monster	World & News, U.S., People, English, Science, Math & Money, Sports	Free	4-14 (K-8)	Yes

Geometry from the Land of the Incas	Geometry	Free	12+	Yes - extensive

HackMath.net	Mathematics	Free	9-18	None

HyperPhysics	Physics	Free	15+	None

IXL	Math	$80/year	4-12	?

Le Patron	French	Free	12+	Yes

LearnAlberta.ca	Everything (mainly aimed at teachers)	Free	5-18	No

Nafham	Multidisciplinary 5-20min K-12 school video lessons for Arabic students	Free	6-18	Yes

Starfall.com	Reading	Free	2-9	None

Smartygames.com	Math Games, Reading, Art, Word Scramble, Spanish, Puzzles, Kids Sudoku and more	Free	2-9	None

WatchKnowLearn	All	Free	2-17	None

For the cell positioned in row 7 and column 3 of this table, provide its content. Format the cell value as a JSON, using the structure {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.

The target cell value in row 7 and column 3 is {"row_id":"7", "column_id":"3", "cell_value":"Free"}.