SELECT count(*) ,  T1.name FROM scientists AS T1 JOIN assignedto AS T2 ON T1.ssn  =  T2.scientist GROUP BY T1.name
Find the number of projects which each scientist is working on and scientist's name.
[Schema (values) (types)]: | scientist_1 |  Scientists : ssn (text) , name (number) | Projects : code (text) , name (number) , hours (text) | AssignedTo : scientist (text) , project (number);