 
 <prompt> ```Who make up di three Yale groups wey do biological research for Slack's study? Based on di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context:``` <response>: ```Slack (2003) dey compare three groups wey dey do biological research for Yale between 1910 and 1970. Yale bin dey important for dis research. The leaders of these groups na Ross Granville Harrison, Grace E. Pickford, and G. Evelyn Hutchinson, and their members include both graduate students and more experienced scientists. All of dem produce innovative research, including the opening of new subfields in embryology, endocrinology, and ecology, respectively, over a long period of time. Harrison's group na classic research school; Pickford's and Hutchinson's own no be. Pickford's group dey successful even though she no get departmental or institutional position or power. Hutchinson and hin graduate and postgraduate students dey very productive, but dem dey work for different areas of ecology instead of one focused area of research or the use of one set of research tools. Hutchinson's example show say new models dey needed for research groups, especially for those wey dey involve extensive field research.``` 