请和你的同学一起认真分析下列句子，并补全所缺内容。这种学习方式能逐步提高你理解长难句的能力。
1. Having collected and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast. (P34)
【分析】
① 本句是一个主从复合句。主句主干为：I help other scientists to predict。
② Having collected and evaluated the information是动词-ing形式短语的完成式作状语。
