success 4 4 0 2134541 801681 FactoidAgeVeryOld Mature, well-established codebase 3 2134540 801681 FactoidTeamSizeVeryLarge Very large, active development team 3 2134543 801681 FactoidActivityIncreasing Increasing year-over-year development activity 2 2134542 801681 FactoidCommentsVeryHigh Extremely well-commented source code 2